Tychoc, DualdudE,
Thanks for the Irvine recommendations, but I have not been able to find a source for them in the US, and with the exchange rate being what it is, I checked Just Engine's prices, about $185.00 before shipping, a bit too much I think.
If anyone knows of a better source, please let me know. Actually, what kind of prices should I be looking at for these engines, so far I have found the Webra for about $130.00 and the MVVS for about $150.00. Anyone know where to get better prices than these?



DarZeelon,
I was going to ask in the first post, but didn't want to sound too gullible. On Morris's site, they list the MVVS at 15500+ rpm with a 12.25x3.75 prop (APC I assume). This sounded very high, probably too high. What kind of rpm's should one expect from one of these 49's with this prop?
I run Powermaster 15% almost exclusively, can the MVVS engines handle this, or will I need to get lower nitro fuel for them?
Are you saying that the Webra outperforms the MVVS with the smaller props? I assumed they were pretty much similar in performance.