I’m going to buy the Somethin Extra ARF and need some advice regarding engine choice. I already got an MDS 48 that runs well (in my trainer with half-symmetrical wing), but I also got an OS FS 70 surpass not in use. I know this one is a little bit on the heavy side. I also know that Saito 72 is very popular with SE, but is it worth the extra cost compared to the performance of the MDS 48 or perhaps OS 70? I could trade my OS for about 1/3 of the cost of a new Saito 72.

I use my trainer for all kind of aerobatics; loop, roll, spin, snap, cuban-8 (and all of them inverted too) without any problems. I use maximum throws but I think this plane is rather boring now. I have tried Somethin Extra, Super sportster, Ultra Sport and 4*60 in Realflight G2 and I prefer the SE with reduced throws.

Regards,
Fredde (Sweden)