The Master 90 is a much better design controller. With the single PC board and the large heat sink, it barely gets warm during a flight. The 77 is 4 boards stacked and heat shrunk. It got a lot warmer during a flight. Also, if there is any issue with a motor pulling excessive current, the 77 does not have enough reserve. I had two 77's fail.

I started flying with older TP cells in a 4P configuration. When TP came out with the first Gen 2 packs, I did have two or three packs get a puffed cell. TP replaced them with the Gen 2 Lites. I have yet to have a problem with these packs. The pack with the most cycles is one of the original 4P packs, with about 100 cycles. I don't fly the 4P configuration in the Partner anymore, it is quite a bit heavier. The most I have on a Gen 2 Lite is about 60. Time will tell on the pack life, but so far the Gen 2 Lites are showing no signs of problems. As to weight, the Gen 2 Lites in a configuration of two 5S3P sticks taped together with the velcro on the bottom for mounting and the Deans connector have all weighed between 44 and 45 ounces.