So to be specific I would have been building the Yamaha 4 Strokes for a customer and would have to stand behind it afterwards. I try to pick my fights when a warranty is included. All the engines were V-6's, scary to replace if I made a mistake.
All the 2 stroke rebuilds I did I ran the 10hrs break-in myself so no questions about the break-in protocol being followed.
Personally I hope the combined minds gets you cruising very soon.