17mm hex

[mistercrash]

Ok I get it. I read slow and you must have typed too fast so that's why I got confused I never tried the Tekno system, it looks interesting but I'm waiting on feedback of other people that have been using them for a while to find out if the aluminum rings they use on the carriers will really prevent the pillow balls from popping out. But right now, the Ofna adapters I modded and the TRX carriers with steel rings have been doing so well that I don't feel like changing anything.