kaamacat, if it's drifting left give it right trim to compensate.

You'll notice that yes, on sloped surfaes, performance can be unpredictable at low altitudes because of the uneven forces bouncing off the ground from the rotor blades and then back up (ground effect), on a flat surface is comes back up more flat but on a curved or uneven surface some areas may get more ground effect than others, so the heli goes in one particular direction. After you get about 5 to 6 feet off the ground though, ground effect doesn't happen...it's all about the wind now =)

Oh, my LiPo pack seems to be in decent enough condition. I finished charging it this morning at about 1/10C rate (150 ma) to make sure the battery isn't screwed up from a fast charge. They say that if you fast charge a LiPo after over-discharging it you do more damage to it than the over-discharge did. The LiPo peaked out at 11.6 volts, 1 volt lower than it should be (12.6). I ran it a bit and then charged it up at 800 ma, and now it's peaked out at 12.45 volts, getting closer. Hopefully in a couple more charges it'll be as close to 12.6 as I can get. I'll use it a few more times and probably retire it, as I need to step down to a 900mah pack because the 1320 mah pack is a little heavy for all the aftermarket radio equipment I put in.

Come to think of it, I've always wanted to see a LiPo battery catch fire, I've seen the vids but still.... hehehe.