Let me suggest you do it a bit differently if you ever go down this path again. Use the 0.3 on the inside and esaki tissue or light silkspan on the outside. Esaki is a little stiffer than silkspan but more expensive and weight is a wash. But the covering is not very ding resistant. Lots of TLC must be used.

Either paper fills quicker than the carbon veils. Still, I don't wet sand until the very end after the base coat is applied. I use fewer nitrate coats on the paper which isn't quite water proof until after the primer. Strength is not an issue with the combo...remember I used a DLE55 on the Delta originally. This big block was not very friendly to the composite fuse but the wings/stabs were/are fine.

I will be building a set of wings/stabs for my new Congruence design at some point and I may honeycomb them both.The technique can shave up to 40% of the original foam weight so it's a worthwhile effort....

BTW-- I have a new hybrid 22x10 prop patterned after the 21x10 apc nearing completion. I think the 185 will spool up well with this load up front. Weight is less than 100 grams. It's gonna be a very interesting experiment.....