I’ve noticed some problems with hole placement and drill angle on the Beam0808 parts. In general the paired holes don’t line up perfectly with each other and the problem seems to get worse on longer beams.
If I insert a long shaft thru the pair of holes on one end, and do the same with another shaft at the other end of the beam - it is pretty obvious that tolerances are a bit too sloppy, due to the angles shown by the shafts.