I love fixing crashed planes. It will take longer but you can use your xacto knife, the saws just save time. Wiping out a new sharp blade is a lot less expensive to get the chore done, even on plywood, just strike over the same cut several times.

In the end you might discover building a kit is more satisfying than building an ARF especially when a landing speed mishap occurs. Kit damage is almost always far more forgiving than ARF damage under the same situation. A similar yet much stronger plane is a SIG Kavalier, Hobby Horse has then in stock for $72. Anyway, that's another thread.

You'll want to cover the joints in your repair with something like epoxy and a strip of thin fiberglass material. These generally require nose weight, so you can remove your lead segments now, recheck CG when you're done.