sorted the COG but its bit heavier just over 3 mins fly time and its not very "crashable" it goes back to kit form you have to get the glue out and start again
3 minutes is all I can fly my brushless mcpx at. Anymore than that, and it bogs too much. Heli looks good, but as you stated, each crash has a lot of repairs.
only using the stock lipo,s that came with the heli. also its built on an early version of the mcpx maybe the newer brushless one would be a better option