Sorry to hear of your wife's medical issues and how that has delayed modeling progress! My Super Ringmaster is also delayed due to wife's knee surgery in June and subsequent complication. A major GI inflammation followed the surgery, and it is now projected to be at least late October before she is really mobile. My (nearly finished) plane sits on my basement worktable, awaiting my building test frames for my (new-used) K&B 0.19 and K&B 0.29 engines. The K&B 0.29 bolt holes fit the bolts already mounted in the Super Ringmaster, and I am tempted to try the plane with that engine, just throttled down and smoking prior to rebuilding the mounts for the K&B 0.19. Is that workable?