Found a local track and got both Matrixes out for a run. The engines are definitely broken in and now it is tweak time. These things fly!!! Now if I can stay on the track I will be ok. Had alot of 'Rough Moments' on the track with end over end and cartwheel action. Nothing broke on the Matrix. Until I got a little carried away on the pull starter and now the cord is stuck extended. I'll have something to work on the next few days.

Overall, I am impressed.