This year my friend and I flew competition with two the same planes, one equiped with an OS-160-FI (mine) and his plane with an MVVS-160, both using an Krumscheid 1015 pipe.

I must say, I am very impressed with the 'cheap' MVVS (close to 200 Euro;s), reliabel starting (flying three rounds, so you hit the prop only three times a day ;-) ) , very good throttle response , and the same RPM on the same prop as my OS.

He now flies with an APC 18x12, pulling like a tractor....

Maybe this can be an other choice.....

Offcourse OS is always OK....

Winfried