Part of the reason you may not see many ST's in this forum is due to several factors, IMHO. Having been one of the early adopters of the ST 2300 for a 2m pattern bird, it's not a "bolt and go" setup. Plus, MOST ST's are known as "rpm" motors, meaning their available torque band is higher than some others. For us, this translates to lighter pitch props, which means more NOISE, thus, no players.

I was "this close" to choosing the ST 90 for my Excelleron when I saw the Tiger Shark 91 from Kangke. It looked like (and so far runs like) an exact clone of the OS 91FX. If it goes sour, I probably WILL try the ST, as I really like them, and have found them to be powerful motors once one "figures out" the carb/pipe/needle/nitro stuff.

Most (no insult intended, here) pattern guys want to "buy, bolt, fly".... and I like to "buy and try"....