Well it worked, the case will fit back on and it's not a permanent mod. In theory a success. Now the problems. The usual issue of leaks is there... and you just know it's in the most pain in the arse location, which is the connection to the boiler, which means I have to dismantle the whole thing to sort it out, then try again, then repeat until frustrated. Which is now. 😉 Also water spraying over the place is an issue even with the T ring thing. That will have to be addressed because the antivac is close to the case which will probably rust easily. Anyone want to put forward a solution??? I didn't use thread tape on the 1/4 M-M fitting on the boiler mainly because the pressurestat didn't have anything, it's leaking now so that's my next step. If it keep leaking then I'll have to put it back the way it was. I think the 1/4 M-M fitting is slightly smaller in width of the nut than the pressurestat, which means that the copper washer isn't sealing as well as it should. Bugger.