In as far as glow plugs go, I've been using the A5 OS in my .46's except in my evo .46 which I have a horizon hobby plug ( guys at the LHS says that the evo runs best on the horizon plug.
Now, some of the plugs are rated as "hot" and some are "cold". When should you use each type? I also have a fox plug in my K&B .65 because the LHS was out of OS #8's.

Dave...