F-1405B 3/8 Hole

In the first few steps of the fuselage instructions it says to take the assembly of two F-1405B and bolt it to the rear wing spar with a 3/8 temp bolt, then double-flush rivet it. I'm finding that the 3/8 inch hole on the end of the part that bolts to the wing is just slightly smaller than 3/8 and the bolt won't go. Did anyone have to ream it out to 3/8? Maybe the primer is too thick but probably not. I'm going to ream the four pieces to make it work.

Yes definitely. Had too buy expanding reamer so I could get it into the hole. Paid about $11 dollars for a reamer that should have fitted back in 1981. The price this time was $132 Australian same brand which is about $80 US.