Wishbone Material

[Oscar]

This is very interesting to me; I'm at the stage where I'm looking at wishbone materials.

I was under the impression (probably wrongly) that the wishbones had to be seamless? Is there any risk that the ERW would fail during normal driving/ harsh cornering?

Also, as I wouldn't mind doing track days in the distant future (when I eventually get it finished). Would the use of ERW cause problems here?