Who here strips spur gears and what alternative do you use?

[gtxracer]

Before I got through one pack I stripped 4 spurs! I know, I know, GEAR MESH, yadda yadda. So how do you explain missing teeth? And I've turned the MM down to around 10-20% as well as the punch, so there's not much else to do. What do you guys use? I know Integy has some delrin Revo spurs that I found the other day, has anyone used them? I'm thinking of ordering an Ofna delrin spur and trying to make it work. Has anyone tried this? I have a Hot Racing steel spur on the way since I have a hardened pinion but I don't want to use it as my main option. Ideas?