Pat.............AH YES.......the frugal bug has bitten us all lately and there is nothing wrong with that. Like you, when I decided to try my hand at combat I went with price, and purchased the GMS.. I have to say that they are some GREAT little engines.........BUT......I did find that in order to get the RPM that I needed I had to go to a smaller prop to get it to rev up...........and there is nothing wrong with that...........HOWEVER......... the combat bug hit my club when my buddies got a look at the speed, the affordability of the birds, and of course the FUN FACTOR, and guess what??? Out come the OS FX 25's........and they blew right by me like I was 3d ing in a Rat Race!!!!

Your basic question applies to all aspects of our hobby. New guys want to get stared in RC, and they go out a purchase a standard Four Channel system..............it dosen't take long before they realize that the 6 Channel, multiple bird, computer system, that was $75.00 more..would have been the better purchase!!!! [:@] Happens all the time.

My advise is........Buy the OSFX25.......spend the extra bucks....TRUST ME...it will pay off for you this summer!!!!

Oh.....by the way.........if you want to get the most out that OS.......purchase a Maxs Tuned muffler for that beast, and use Master Airscrew 8x4 props!!!! GREAT COMBINATION!!!!