Has anyone gotten an official word from Van's on whether to use 426-3 or 426-4 rivets on the flange of the rollbar? On page 37-04 it says to CS for 426 rivets. The diagram shows using 426-4-5 rivets, but all of the holes along the flange and the strap are 3/32", not 1/8". It doesn't say to final drill to #30. There have been a couple of rivet errors and I am wondering if they want this to be a #3 or #4.