That's a good point but I'll have to think about it as my interpretation is different.
The assembly note clearly says "until the screw spins freely", which to me means the threaded section passes completely through both holes. I think the fastener may have a smaller diameter section that is long enough to pass through two thicknesses of strap.
If it were only about avoiding "pushing" the tail during assembly, a clearance hole in the strap would accomplish this. In fact, the repro straps I bought did have a clearance hole. But with the supplied "normal" (fully threaded) screw, the strap was clamped. Getting it to spin freely would mean stripping it which would not be a good idea IMO.
I'll have to go run this special fastener through the old strap and watch what happens.... stay tuned.
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