Quote Originally Posted by BillTodd View Post
They don't have to be that strong, they just have to be straight.
Yes I realised that (as there'd not be much deflection force operating downwards), but I'd imagine getting 'straight' at a length of about 1.2m might prove a little difficult (I'm also thinking bass guitars might be an option so now allowing up to 600mm - so 600mm drilling 'travel' + 600mm to retract the neck before/after drilling it = 1.2mm rails needed)...which is why I looked at supported rails...they be straight!

i'm open to siggestions though (I can feel a custom rig coming on!)