If you are saying that one of the holes in the engine case is larger than the others, Dan will not be able to help you. I have a Diehl case, and all bolts are the same size (diameter).
Is there a helicoil in that hole where it is larger? See N64KR at http://KRBuilder.org - Then click on the pics See you at the 2010 - KR Gathering in Richmond, Ky - I39 There is a time for building and a time for FLYING and the time for Flying has begun. Daniel R. Heath - Lexington, SC -----Original Message----- Contact Dan himself at Dan@ diehlaeronautical.com and he will get you the right answer.