Well, the prop shaft is now the correct length (shortened by 3/4") so it doesn't trash the tail shaft oil seal, the diff's back on and centred (top tip - use a stick with a pencil mark on it), the upper mount bolt lightly kissed with emery so it's a snug fit and well copperslipped, the gear box mount spacer's fabricated (15mm billet aluminium £10 off eBay), the reverse light switch access hole's enlarged so the switch is now accessible, the switch connectors modified so they don't snag the beautifully crafted cover plate and the holes in the bottom chassis plate have been adjusted so the gear box misses the chassis rail at the front and the prop shaft clears the chassis rail at the back. What next I wonder?