Greif Pains has done it to me again !!!!

I have a Lancair with STAB problems....
12 mm dia tube
8mm diameter holes in stabs
and the book says 1/4 " dia STAB TUBE

A buddy started assembly and opened up the hole in the fuse to accept the 12 mm tube.
and the debacle contues.......

GP said there is an addemdum in the kit and a 1/4" tube NOT
but then how does one get 1/4" dowels inside a 1/4 OD tube???