I was deciding for too long but at last when a colleague was on bussiness travel to US I went for it and ordered it also with MBPrimos 2150kv.
Used the DYS Aria 32bit ESCs from M250v4 and other electronics from AmaxInno Freestyle 7" v2 (BrainFPV RadixFC and PDB + Matek-VTX HV + R9 Slim as reciver).

I replaced caps on ESCs with 220uF 50V althoug that was not neccesary. There is plenty room for VTX and receiver. BrainFPV Radix with it's PDB fitted nicelly aswell. I may try to use better motor sofmounting. The 1mm TPU might not be enough but Betaflight does terrific job anyways.

I am now running BTFL4.0 with rpm filter and flies nearly perfect. I think I only need to work on PIDs now.

Pretty happy how it came out.