bj, the Super Tigre is an excellent engine. The mid-rand issue is a non-issue as far as I am concerned. The Chinese versions have cured the problem and they are as good an engine as you can buy, no matter what the price. It takes a while to break in, but once broken in they run extremely well and pull like a mule. I am flying an ST90 that I haven't touched the needles on in over a year and a half. Prime it, glow it, flip it and fly it.

Go with the Super Tigre 90, you won't be sorry.

Regards,
doubledee