Hey jiott, I do have a dremel but none of the sanding bits I have are small enough to get into these places. I havent been abel to find any that are less than 3/4. I have tried to cheat with the stones but they end up getting gummed up and arent meant for the application. As for hysolling the varnished ribs, they were epoxied to the frame before varnishing. I just need to add ribs in the vert stab and was wondering if sanding will work or if the varnish goes too deep.

Cheers