ORIGINAL: daveopam
I forgot to mention. A MA 13x6 gives great spool up on a ST 90. I have one on a 90 powered Pizzaz. The verticle is stunning to say the least.
Yep, it's been my experience that the ST90 likes the MA Scimitar 13x6 above all others. People say they're a torquey engine that likes to be loaded down but if you throw a 13x6 on them you'll see that they really do like to sit at around 12K-13K on the ground. It also seems to help with the miserable mid-range too.