18mm wheelbase chassis block for 9mm gauge. Designed for Ruston Diesels in O9 (replaces KBScale chassis block), but can be used for other locos. Needs Nigel Lawton 10x12mm motor and parts to complete. This is in 2nd prototype stage - contact me if you wish to know which bearings/gears/motors it requires. I'll update this as soon as I've got it built (1st prototype works, but required tweaking).