Al the 2S cam is very reliable in my 850 motor its been in it since the early 80s I run 40thu flat top pistons but my head has a lot of port work done to it but still running my stock valves, it has never let me down in all those years of running it and I ride my Norton pretty hard, but its great when the cam kicks in and will keep reviring freely way past 8,000 rpms if you let it but I wouldn't if you don't want the rest of the motor to go bang.
As for heat I built a open carport off the front of my shed, my bike lift table is kept under it and I do all my bike work under the carport as inside my shed dueing the day is way to hot, but I have good lighting inside my shed for working at night if I need to do any machining, best part about the open carport we get a good sea breeze as I am only 1 mile from Moreten Bay and up on the highest part of Brighton, once the SE breeze starts to blow things cool down, my shed is set up for bikes only can't get a car up the back of my yard and was built for bikes only, its a well set up shed, music, beer fridge and bikes, what else can a man ask for and my girls need permission to enter, except for my female cattle dogs lol.
Ashley