What is durability of the 3sp Savage transmission like?

The thing with a three speed is that you can change your pinion/spur combo to accommodate the three speed.

If I find the first gear uselessly uncontrollable, I'll just change the pinion out until I get what I want. This also means that I will get more top speed out of it.

I find that my brushless setup it not powerful enough to go on a single speed (while keeping me satisfied).