I've started working on a new rocket after our last launch of the year was shot down by high winds. It's a clustered engine rocket, with the engines seperated in individual tubes. One of the questions I have been pondering is to use balsa with paper skins or plywood for the fins. They seem somewhat skinny and breakable to me for balsawood and 1/8 plywood doesn't seem to hurt the stability much.
Here are the plans and a picture of what I have so far