I had Dutchman machine a set of OG 911 axles to fit a Subaru inner joint on my STI engine 914 autoxer, but I snapped one of the axles right where the machining was completed. I was a BIT over-aggressive during an autox launch! I ended up having Dutchman make me a set of custom Hy-Tuf axles for ~$600 in 2018 and they've survived a lot of abuse since.
To see my axle mock-up, go to post 179 of
http://www.914world.com/bbs2/index.php?sho...3031&st=100.
To see the carnage, go to post 365.