mx5 roadster wishbone tube size/type

[Talonmotorsport]

Every other kit manufacturer uses ERW tubing for it's wishbones, CDS was stated in case any body just picked up any old length of material not knowing what it was and used it to make the wishbones. Just think what would happen if you found out that you had used leaded tube or a bit of old hover hose?
25x2mm and 20x2mm ERW will be fine to use I've made over 300 sets and not had any reports of breakages.