The OP has made a great point. On Sunday, I had a look at his 210, and the spec of the kit is much lower than on the 410.
I think the expectation may be too much, from a company that set the bar high with the original 410 cars, and is now producing cheaper lower spec kits.
Regarding the plastic hexes, you should have confidence in tightening a wheel up all the way without it squashing, unless a torque wrench is supplied?
Unfortunately, £10 per kit may not seem a lot to you, but it will make a lot of difference to Durango on the volume of kits produced.
I'd also like to add that David knows how to build a car, from his time spent racing, and the time he spends preparing his cars (just ask his wife).
Anyway, let's not get tied up too much in the specifics, and congratulate David on posting a sensible post on Oople for a change