I built my own KKTO however if I was to start this project with 1K I would just buy it from Bezzera!!!  I have one 2yo and one on the way but remembering the time (or not) around Millie's birth no project I started at that time had a completion time of under 6 months! 

Do you want coffee now?  Buy it from Bezzera!
Is your wife happy to have you mucking around in the shed revising rebuilding?  Make your own.

I have kept my Behmor but this is now my default roaster!

You have 2 options
1) Get a complete kit that is easy to assemble or comes pre assembled at an extra cost 
2) Use select portions of the parts kit to build your own
e.g. Liner, insulation, agitator blade, High temp tubing
You can then create your own

The crucial part of the build is the volume
Any smooth (non rivet handles) 24cm pasta pot will work
However if the pots are not the same measurements as the Arcosteel  or Baccarat Classic then the shaft may need to be altered or build one to suit, as the depth of the insert is mated with the drive shaft length
With DIY you can use a stronger motor to push over 1kg and modify (re Borat) the TO and the roaster will roast 1kg at a time

KK

You can build your own timber base and fit a stronger motor e.g. 12 Volt car window winder motor
I can instruct you on how to build a different base
You should be able to modify the KKTO drive shaft to suit but the rest is the same 

KK

Paul, you are one great guy!  How many people would offer what you are offering the home roasting community and at no financial gain for yourself!  You've research, tested, built, modified, adapted then made all of your knowledge and results available to all.  More than this you've offered to help people mod your design to suit their existing parts and budget!  Here's to KK! 

Unbiased opinion I don't own one but at that 2kg figure and limited time it makes sense to go down the path of a KKTO. Better option than a straight Coretto based solution.

My consumption is generally 2-3 roasts a week in the Hottop when I am roasting and I like the variation and time isn't that limited. so 1-1.5kg a fortnight. So this suits me.

Behmor for some is a great point and shoot solution for a lot of people but it's to hard to play with the roast for my liking.

Other option is you can always build up the forarms and do 500g batches by wooden spoon power in a bowl

Borat, with your "Frankenturbo", would you do it all the same if you were to do it again? Should I take this opportunity to mod anything else? My mate will help with electrical mods but I don't want to be ringing him with "just one more thing if you can" type requests - I'd rather give him the list up-front.

I find that 1kg is a sweet spot for me in more ways than one.  It's almost a set and forget on my KKTO setup, as the larger roast size with the mod means after the preheat, you just switch the element on and wait until 1C before you need to intervene and do something.

Also a 1kg roast easily fits into 2x 500gm bags and lasts me about a week or a week and a half.  As soon as one bag is gone, I go out and roast another kilo.

If I get lazy, or forget until I'm out of beans, I'll roast 2x 1kg batches.  By the time the first kg is gone, the other bags are already good for drinking...

So coming back to your question, is there anything else on my setup that I'd mod - not really.   Bigger roast batches are only good for me if I happen to be doing more for somebody else.  So I can deal with the limitation of somewhere around a kilo, as it suits my requirements 90% of the time.

You'll need to put in some type of chaff slits.  I actually never tried the pots without slits so I can't say how well it works without them - but it does do a good job with them.

Don't foget to buy a stainless type thermocouple (KK will tell you how to get one), and mount it on the base of the inner pot.  All you need is a small self tapping screw, and a couple of bits of wire to secure the braid on its run up the side of the pot.  If you get a CS meter,  don't bother with the style stick type probe as its a pain in the backside and you don't want to be drilling holes through the side of your pots.

And set yourself up with a combo vac / cooler system so you can just vac the beans straight out of the pot and into the cooler, instead of buggerising around tipping out hot beans.

Muscles... For goodness sake do not get the Eco-friendly extraction fan. It takes too long to cool. I'm replacing mine! 

I did a 1kg roast yesterday and it worked well.  Its not my most even roast but this will be more about the beans than the roaster.  Lots if imperfections!  The roast was done in 22minutes to 2nd crack but then again my pot is insulated and my TO has the stupid heat shield deflector plate thingy removed.

Here is a PDF of my cooler design
(see attachment)
KK

Here's a pic of my combo vac / extractor fan cooler:







And I don't normally show my slits in public, but hey, here you go. 

This is an old pic before I upgraded to the double agitator and the stainless braided probe:

Excellent work Marc!  Sorry to not have posted sooner but at least you could return yours.  I cut bits off of mine to it it n the bucket so a return for exchange would make an interesting comedy sketch but that's about all.  I looked again at my 1kg roast yesterday and in the clear light of day actually looks far more even that by fluoro in the shed so I am really happy.  Even better it smells wonderful so once again thank you KK for a roaster that will do 1kg beautifully and doesn't cost 5K!

Don't forget your pipe at the bottom of the bucket too...   

And here's your nozzle:  (it fits exactly into the pool hose flange)

Nice work Marc... be interesting to see what price they offer you on the Smart... I may grab one for plunger duties at school.  The old Lux is getting to be quite noisy. 

Kelsey may be selling his Smart cheaply due to some low-life giving him a bum home roast after a KKTO incident between 1 and 2 crack with a loose agitator and a minute or two's inattentivness    BUYER BEWARE!!!