Leo modified caulk gun to work with AC-251 sealant tubes. After sealant bead was applied around perimeter of canopy frame, Harry, Curt and Leo lifted and spread canopy while I aligned the holes and inserted clecos. All rivet holes were secured with clecos; some extra fillets of sealant were applied and smoothed. Canopy will be left to cure for a week before any further work is done. Curt, Harry and Leo: 1 hr ea. Martin: 2 hrs.