Excellent review Darren & I fully endorse your praise for this kit. Having (nearly) built/customized three of them I offer the following additional comments;
The jamming of too many sprues in not enough separate bags did cause damage to several items in each of my boxes. However with care they can (in most cases) be repaired with glue/cyano before removal from the sprue. Having said that, one of the many great points about this kit is the plastic itself, forgivingly flexible which is a life-saver when detaching the many ultra-fine parts. I can only think that the breakages in my kits must have been caused by someone hurling the boxes against a wall several times.
I think you’re correct that the electrical pick-up was reversible (and isn’t allowed for in the kit) but because the tram is identical at each end it can be simple turned around on the track if necessary. Yes the spring should have been in brass (it’s diabolical to free from the sprue) and even better if the handrails & driver handle were also. The other problem with the vac-form base (apart from the dimples) is that it’s too flimsy and sags in the middle under the (considerable) weight of the tram, so it needs bracing underneath - I just used lengths of empty sprue, of which they’ll be plenty when everything’s completed. And MiniArt does offer separate additional track-base & power pole sets to extend a diorama.
Another aspect is painting the beast – not straightforward, and maybe the instructions could be more assertive about when to paint – and not paint – the sub-assemblies. Obvious to experienced modelers maybe, but (for example) the instructions just assume you remembered to paint the bulkhead walls and interleaved sliding doors before marrying/installing them, and the glass within them.
I agree it's overall a brilliant production, and a welcome (albeit challenging) breath of fresh air from building AFVs.