Terry,
Welcome back. I missed you, but somehow did not know the reason for your absence. Great that you are up and running again.
I am sure you know where to get bearings. Other than that, hens' teeth. Last year, because 424 accepted The Evolution .46nx, we did as well. Then we ran into some problems with starving in turns. The guys voted to unaccept the engine. During the year we had some use them and did more testing. I think it is the disparity in tank to carb height of our upright mounted engines. This winter they voted to get accept it permanently and live with it.
I now have 2 of them, but they are still NIB. We believe it might, might be a bit stronger than the TT, but the real factor is pilot skill. You know all about that, but others will, I hope, read this.
Now I will use the link and read all about it.
Very good to hear from you.
Ken