Ok! From time to time I see a pic' of A "Y" Frame and it would seem that there is a great amount of Tow Out of the Rear Wheels. Now common sense would say that that is all wrong and would Scrub Tires badly and very, very quickly into extinction.

I have set the Wheels on Schrodinger with a little Tow In and she seems to run very freely, that is while I can keep them in that alignment. This is probably something that most of you don't have to think about as long as you keep the Center Line of both Axle Stub and Axle the same before Welding.(Straight Axle) "Y" Frame Axle is Getting the Alignment Right before Welding.
In my case there is the problem of not being able to "WELD" Carbon Fiber"[}:)]. I have had the LAZER Level out and had to set up a rough Wheel Aligning setup on the garage floor and move the Metal Stub and Retainers gently into position before Drilling and Bolting them Once I have all that right then I will Epoxy them into Place perminently. Again another exercise in ingenuity. BUGGER.

Life is full of trade offs, though I still reckon the Carbon Axle is a good way to go.

Ron