RE: ST G20 15D
Reading the review, ST G20-15D peaks at 15,000. I've been running 8x4 in OTS releasing at @14,000. Seems to be the happiest prop for engine. I've also run 9x4 at 12,000, which is OK but I like the 8x4 better. On the 9x4 there is a very noticeable pick up in RPM on release.