Just a short little blurb on a handy product. I've recently regreased my mechboxes with this grease;
It's avail @ any canadian tire in the bicycle section. I recently played a winter game with temps ranging from -8 to +2 during the day, and while other aeg's developed rof issues due to the cold weather *, my M4 kept on singing. I believe "sounds like a buzzsaw" was the phrase.
* yes I'm aware that your battery setup can come into play, but my setup of 9.6v 1100mah was pretty typical amoung the group, if a bit on the weak side.