I agree with you the spacer & one single bolt is stronger than the two bolts.
The only problem is to start with this when you fit the WAFs to the spars, if the WAFs are slightly out of alignment you have a hellve job to get the bolt in without damaging the bolt or the WAF's . As there has never been a problem with the original set up why go looking for trouble. I have this problem my KR was built in the early 80's & had the single bolt. When I removed the bolt I was a bit shocked at the condition of the bolt, the bolt needed to be incouraged to go in the hole, I think someone had used a hammer. The WAF's are slightly out of alignment I feel there was too much stress on the WAF & the spar to get the bolt through both WAF's. Both front & back spars are the same. I want to go back to the multi bolts system, I will feel better with good bolts & no stress raisers. As Mark says make sure the thread of the bolt is out of the sheer load on the WAF. Robin. NZ.
