The 3mm TOC-53 turns a Xoar 22-8 at about 6800 rpm when new. One that I have turned a Mejzlik 23-10 at 6400 rpm after the 3rd flight when it was plenty warm. That's a big prop.

I was out with another new one today which was turning a Bolly 22-10 at 6500 rpm after about 10 minutes of running.

The TOC-53 has a hard chrome cylinder surface which takes quite a while to break in, so they get stronger over time as the rings seat.

Unless you are actually working with an engine (any engine) you should not jump to hasty conclusions. The TOC-53 is a first class piece of hardware that will haul around an 18 pound plane with plenty of power for unlimited vertical and is very easy to live with.

TF