I got the last gear drive rim adapter to test out on the g70 tonight. Man that is a tight fit. But its in there. Ill be running it this weekend. This one is not hardened any. Just machined it and said test it out. Now this is also not just mild steel round stock. It is something a bit harder. Im not a metal guy so i dont know exactly what it is, sorry. But i do know its not mild steel. Ill let everyone know saturday how it performed. I dont expect any issues.