Right, done various bits and pieces over the last few days, none of which are visible, welded sleeves bracing and the like inside the chassis. So today I continued with the front suspension, made a jig for the sliders cleaned them up and welded them. I test fitted the wheels before making the jig, and got 5 degrees, checked against the photo of the original, and got the same, so I've got something right.
Photo shows the rear of the offside (UK, so right hand side facing forward), with the assembly in place, with the spring I'm going to start with, it'll be cut down to 2 x 4", and 2 x 1" springs, so will do both sides. The bearings will go inside the sliders, not fitting them yet, I'm waiting on some weld nuts and grease nipples, before I fit them.
The bolts used for the spindles will be retained by grub screws, 2 each side, to clamp them in place and prevent rotation.
Still struggling with the degree of accuracy required, I'm used to building 1/12 scale or smaller with fractions of a millimetre accuracy, working to 3/4 scale and within 1/6" or thereabouts takes some adjusting to.