I got caught up in the naked PF hype about 12 months ago, had a spare Rancilio PF that I took round to the local engineering WS and they milled the bottom out for me, they did a great job, I used it for about a week, before I decided it was not for me, as Muscles commented, you get the odd squirter which makes a bloody mess, to me the coffee was no better or worse than the standard PF. So the naked has found its way into the junk drawer and I doubt it will ever see the light of day again. 😉