Well, inspired by Sal's phenomenal build speed, I got crackking on my own little car! As previously mentioned, the suspensiion is very fiddly, and best tackled in several sittings just to let enough glue-drying to make it solid as more bits are added.
I gave up on the "moveable" linkage at the front - it's too tiny for the heat-rivet procedure in my opinion. And the two tiny arms that hold the hubs to the steering spindles are farcical - these should have been a one-piece affair for the sake of my sanity!
On the rear, I tried doing it all at once but soon found it was too flimsy, so instead I built the springs and let them set overnight before adding the axle.
Rear seat assembly is a bit "loose" in terms of fit, but is a doddle compared to the front bulkhead with the steering wheel! That bulkhead has two tiny locating nubs that make for a weak and uncertain fit, so after I glued it on I added the body shell and set the whole thing upside-down to dry - that's the only way I could find to make sure it was at the right angle. And don't get me started on those microscopic floor pedals...
Up front, I wonder why they made the Opel badge as a separate PE part? It needs painted anyway, and the multi-part tooling would make it easy to cast it into the grille... And that "torpedo" hood ornament really needed a short mounting pin - it was so small that I wondered how to hold it in the tweezers and still get at the sprue gate for clean-up.
The side mirror is interesting - it fouls the door such that any attempt to open it would push the mirror through the front quarter-light window! But when I looked online at real ones, that seems to be how they were built.
Round back, there is a very fiddly PE bracket behind the license plate - I almost replaced it with plastic. Otherwise, the only challenge was the folded roof - it is hollow underneath and fits as though it was designed for a different kit.
Speaking of fit, take a look under the front fenders! Yuck!
Now I wait for good enough weather for primer spreaying out in the shed...
Tom