Terry, I don't recall needing any more of these filler pieces but YES you need to make sure they rise to the fall line - even if it requires another piece.
***************NEWS FLASH!!!!!!***************
Okay, so I went out to the shop and counted the layers on the bottom wing: one below the plywood former and two above the plywood former PLUS an extra little filler piece on top, just like you're going to need. That extra one you have will make a handy template for the ones you need to cut out: mine looked to be around 2mm thick.
You lucked out cuz I'm actually covering those very hand holds in a few minutes and once covered I'd never be able to see that detail.
EDIT!! As I said I’m actually covering this area right this minute and I happened to discover something I missed. I only paid attention to the TOP of the hand hold fall line. Well my bottom fall line needs approximately 3+mm of fill too. So instead of covering I’m back to cutting balsa!
Last edited by mitchilito; 12-20-2022 at 07:11 AM.