RE: TBM Shock Jet
The one thing I noticed is you battery is back by the ECU. I placed all 3 batteries as far forward as possible and that helped with the balance. In fact, after I added the second 2600mAh Li-Ion in the nose for the receiver, it balanced with no additional weight needed. Just an FYI on maybe shifting your batteries in the nose to help. Also, Idid not have to shim anything on the motor and Idid not touch the trims and still haven't. Also, watch how much down elevator you mix with the flaps. I added what TBM sort of recommends as a starting point and it was too much for me. The nose pitched down pretty good but I was still able to easily manage it with the stick. So I dailed out a bit and now for full flaps I am almost using what they recommend for half flaps and no elevator mixed with half flaps. Now, that is my set up and everyone else is different just letting you know what I am seeing with mine and the P-70 combo. Hope it helps.
Jason