I am in the process of planning my next project. (If the wife only knew. )

I am looking at a TT Lazy Tiger P-51. This plane calls for a .20-.30 2 or 4 cycle. I have been bitten by the four stroker bug, so I am looking for one in that size. I am leaning towards a OS FS 40. The .20 - .30 four strokers just look a little anemic compared to their 2 cycle counterparts. And the .50+ crowd is a little on the heavy side for a 3lb plane. Do you think the FS .40 is a good match. What would you all recommend? Thank you in advance.