Hallo. After more than 5 years since kit purchase, my RV4 in nearly ready.
I bought a Crow harness set (front and rear seats). The rear belt attaches have an AN4 hole. The front ones have a wider hole (maybe AN5). I can't understand why.
However, before drilling the aluminium bars on the fuse floor, I would like to know if it is better to drill the wider hole or the smaller one and use a washer to accomodate the space between the bolt and the SS Crow attach.
DWG doesn't call for the hole diameter, even if in the rear seat belt section calls for a 1/4'' (so, AN4).
Edit: I found a similar answer in this thread: Capflyer suggests washers instead of enlarging the hole: