I had built the very similar Bridi Krafty 60, basically the high wing version of the Aircruiser. I would strongly recommend not putting a modern .61 in it. Mine started out to be a trainer for my stepson using an OS 60FP, by modern standards fairly low power and not overly heavy. Even with shifting the RC gear back as far as it would go, it still required a fair bit of tailweight. We flew it 3 times, and it was simply overpowered. Put an OS 46SF on it, took the weight off & it was a much better combo- especially for a new flier. Opened up still did everthing you would want to do.

These kits were designed when the lightweight K&B 61 was the engine...a modern 40-46 is a very good match.