Putting a Branchlines Gearbox & Mashima Motor into a Bachmann Std 5 73xxx. Steve Wallis. Why??.
Removal of the Mazak chassis material is necessary. If as I, you don’t have a milling machine, use an electric drill with a rotary burr.
(I’d previously found the axles were binding on my model – hence the file marks!)
An obvious location, if desired even more Mazak could be swapped for lead.
One piece of lead bent into shape and another strip added on the firebox crown.
The smoke-box is another obvious place, and insulation tape isn’t necessary here.