Neal, George, and John - Thanks for the comments! I'm pleased with the outcome!
A fiddly kit to be sure, like many old kits! But really nice little moulded details all through it. I found a few parts that are similar between this and my Lindberg LRW kit, mainly the V-8 valve covers, and the go pedal!
The biggest difference between the IMC and the Union reissue of this VW is the colour of the palstic (IMC - red, Union - white), and the Union instructions have most of the build and option notes in Japanese! I've managed to find, and win, two online auctions (a sealed one, and this built up, which came with another unbuilt kit in an open box, all Union kits). They are out there, and do fetch $30-40 for an unbuilt kit.