Tazet's been helping out in the garage today.
I messed about cleaning blue gasket sealant off the primary chaincase & fitted the crank pulley & a few odds & ends, while she fitted the prop shaft & handbrake lever. The prop was a bugger cos it's a "precision fit". A perfect fit between the gearbox & diff flanges, but it has a lip around each end that has to be lifted over the nut that holds each flange in place. If you've fitted a Reliant prop you'll know what I mean. In the end we had to loosen the engine/gearbox mounts & ease the motor forward a tad, bolt the prop in & let it find it's own position as the prop bolts were tightened.
Waiting for SaddleBags to sort the yokes out at the moment so couldn't move the trike. Then we found an abandoned skateboard near my garage. Ideal. Put a block of wood on top of it & shoved it under the sump. Now we can roll the trike out into the daylight at last.

I always set the trike frames up by putting the wheels on the axle then setting the propshaft up parallel to the ground, which gives you the height of the engine off the deck. On my own trike though, I've ignored that & set the engine slightly lower, simply because it looked better. So my prop runs slightly nose down.
Propshaft on. Handbrake lever on. What's next?
You can bolt the battery box in place.
O.K. How?
2 8mm bolts through the mounting holes in the bottom of the box & through the mounting tab on the frame.
What holes in the bottom of the box?
What?! Those ones right there.....oh bugger.
Absolutley no idea how I've managed it, but the battery box is peppered with all sorts of wiring & electrical component holes, even a hole for the plastic breather pipe on the battery -but no mounting bolt holes. How the hell did we miss those?!
Not a big problem, but now we've got to very carefully drill a couple of holes through my nicely powder-coated box. Ah well.
Next to go on is the water pump, then the alternator & fan belt, radiator then the footpegs & pedals. I've still got to make up an exhaust system. I think I'll end up making it in mild steel & spraying it black, then getting a stainless copy made at Valley Gas Speed Shop when I've got the money. Once the exhaust manifold's on, the carb can go on.
After that I just need to sort out the rear mudguards & cobble together some rear brakes from the bits left over after Flap nicked my old ones.
Wiring, hoses & cables & it's done. Easy!