A jig that I made up from an Iain Rice idea. (Etched chassis construction????)
A frame building jig.
Made from a bit of MDF worktop, more MDF and lines drawn out at 90degrees. Check they are at right angles using the old trig.
MDF off cuts can be found in skips.
Two sine bars...steel bars that are flat, parallel and the same size, can be obtained from your friendly engineering shop/factory etc. Do Eileens do them?
1/8" Silver steel bars.
I used it to make my first chassis that ran first time! Wish I had made one ages ago.
It is an aide in making sure that everything is parallel and square. Note that the coupling rods are at the end of the silver-steel rods so as to reduce the error at the chassis.
I hope that this inspires someone else who has trouble building locos.