Oh nice. so you didnt have any problems getting the engine started in these frigid temps? Right now its about -15 but we just got out of a cold snap that lasted a couple weeks with -25 temps. that was fun. so I figure if I break the engine in during these -10 temps it wont be as bad.
If this is your first nitro I would wait for warmer temps , during break in the engine needs to reach a certain temp and stay there , when its really cold out the engine will have trouble getting hot enough for proper break in .