Greetings all,
I’m planning to build my first full suspension mtb and seeking your experiences to help me decide on the frame.
I already have a hard-tail bike and now looking for a full suspension with150 mm of travel, after some research I narrowed my choices to the following:

BXT-MTB-087 29er ($629 with shipping) .
https://a.aliexpress.com/_mPwu4ts

winowsports 29er ($640 with shipping) .
https://a.aliexpress.com/_mqBmps2

DIYCarbone bike frame F150 / ICAN P9 ($895 with shipping) .
https://a.aliexpress.com/_mOhN0aS

I’m planning to pair the frame with Rockshox pike ultimate, a Fox float X2 rear shock & shimano XT8100 group set.

based on the cost alone I’m leaning toward the BTX frame but I’m not sure if it will fit the X2 shock " exchange several emails with BTX and they just repeat what already written in the add, I don’t think they really know what piggyback shock is or if the X2 can fit or not!".
I found many builds for the F150/P9 and the frame looks OK but is it worth the additional 255$?.

I couldn’t find any additional info/builds for the other 2 frames so I’m not sure they will fit my components or how they compare to the F150/P9 frame.

Any information regarding those frame is greatly appreciated.

thanks