Labour is cheaper than CNC machines in China, apparently.
I'm really pleased with the model in general. Yes, there are some aspects that need improvement, but the shell is much better than the TM's. I ran my pair briefly on Friday and they are not to Kato standards, but better than the TM's I have and the Athearn SD75I's. I imagine with some breaking in (likely tonight as the Unitrack roundy-round will be put into use) they'll run better.
I really have to commend IM for doing these, I mean would any other Mfg even attempt an SD40-2W in N? Atlas won't touch the GP40-2L in N, and it offers more roads than the SD40-2W, which still has only ever been operated by CN. Second hand purchasers to date have all been scrappers.