So when our Cessna 0-470-R continental is ready, which one would you use? The Pponk super eagle 0-470-50 conversion? Or the Texas Skyways 0-520-F/TS upgrade? I know they have an STC for an IO-550 now, but that's too much $$$$. The Skyways 0-520-F/TS engine has 500 more TBO than the Pponk. I have not priced any of this with either Pponk or T.S., so I may be comparing apples to oranges. Any other alternatives? I'd like to hear from y'all and anyone who's done this. Something bigger is definitely going up in the squirrel cage when it's time.... Maybe RR or somebody will come up with a 300h.p. $40,000.00 turbine or diesel between now and then, but I doubt it. Thanks in advance.