I happened to call Vans on this same issue today, and was told that the plans should include and instruction to final drill to no. 19 the holes in the access panel covers before dimpling them. But you still need a few of the larger (black) clecos if you go this route.
Walnut Creek, CA
RV-14 slow-build - finishing kit in progress
1949 Cessna 140A - IRAN'd 2017
Dues paid for 2021