I am looking into buying an 89" Sbach Thunderbolt with the GP61 engine. Does anyone have a working knowledge of the GP engines. The price is not bad but have no dealings with them. Any feedback would be most appreciated as this is a large envestment for me. Thanks very much in advance.

Hello,
I'm flying a GP123 currently in a EF Extra 300. Awesome engine! These are very much a high end motor. The 61 out pulls a DA 60. I would not hesitate to buy one of these.
Also, the service and support is top notch. Check the threads on Flying Giants.
Cheers!

Thanks Dano for the reply. I'm fairly new to the hobbie and just wanted some information on them. I currently have a P51 Mustang that I flew alone and crashed it. I have it put back together and will fly ok. I bought a foame Dynam Devil so I could practice and have glued the landing gear back on a few times but is still flying. I was looking at the larger planes after watching and listening to other pilots talk about how the larger planes handle. I just hope I'm not making a mistake here? Any way thanks again for your input and have a good one.