Thought I would alter a chassis a little to make it a " mark 2" frame and style of axle box. If it would help, I will document what I do.
This is the progress so far. I took a cast chassis and added strips of plastic to make it look like a shalllow channel.I am changing the axle boxes to a different style, it could be a more modern style with roller bearings or needle bearings.
I will spray the chassis with primer and add a box around it ready for making a silicon mold. The other is the cover for the hole that will be drilled through the axle box to take the bearings.
I have already put a box round it and will give it a spray of primer as well.
I have already made a new jig for drilling the axle boxes for the slightly wider chassis
New chassis and cover
New chassis showing plastic strip (needs final finish)