I'm amazed by all the negativity surrounding RTR stuff nowadays.
I'll repeat again my 'knowledge' of QC of Chinese manufactured toys, for that is really what our models are. They're not top end, high-spec, high cost, mass market electronics or consumer goods, they're specialist items for a limited market.
Some years ago I was working at a large toy companies' warehouse when a 40' container arrived. The QC staff sampled 3 boxes of 12 items each. The items were about the size of a OO wagon, so who knows how many toys there were in that container! Each box was deemed satisfactory, whether that was 'absolutely perfect' I can't say but the entire container load was passed as OK for sale
Apparently there were no QC people in the factory and a return ratio of anything up to 10% was deemed as satisfactory, anything more and it became a cause for investigation, whether that led to any kind of remedial action I can't say, but having QC people on the shop floor was deemed too costly. As has been said above highly skilled and knowledgeable QC people cost a lot of money, that cost has to come from somewhere, ie added to the manufacturing costs.
In the clothing trade, many manufacturers moved their factories offshore, one in particular I know of moved their manufacture to Portugal.
Put a lot of skilled people out of work here who produced goods with a very low reject rate as problems could be dealt with quickly.
Turned their factory into a massive warehouse, with a small number of skilled people here to inspect and, more often than not, repair badly manufactured goods.
This was an up market company so faults couldn't be tolerated, the price reflected this. Items that still couldn't be sold at full price ended up in the factory shop, the shop became overloaded with stock, much of it still at £100+.
That company is no longer trading.
What i'm getting at is if people expect everything to be perfect, it's gonna cost a whole lot more than it does now.
As for the K1, will I be buying one? Afraid not, the price of RTR has already left me behind, I have two kit built ones which I'm quite happy with, having built them for myself and even then I have limited use for them.