Hello another technic follow up question....,
The brick round 4x4 with 4 side pin holes and center axle hole - 6222 in:
LBG x 9
Reddish Brown x 14
Dark Bluish Gray x 4
Are some of these interchangable as it appears to be the same skeleton (Anio used in his pod racer) structure from photos you'v eposted of the work in progress for the tail section
Thank you