I'm having a hard time justifying the cost of a pneumatic rivet gun to buck the solid rivets for my CX 5. The wing spar for this build is the only place that I'm aware of that uses solid rivets, maybe 200 in total. I'm thinking of using the modified bolt and hammer method that Sonex offers up as an alternative to builders of their planes. I took their builders course and bucked rivets using this method, and it works. Wondering if any others here have done this.