A machined kit it is just that – machined, not fine finished and fitted, that is upto the buyer and to be fair Stuarts say that the kits are "The components are all turned, milled, drilled and threaded" why else would they say files are required if you are not expected to do some work on the parts.
They only state "polished" on the ready to run engines.
Same applies to things like the Steam Traction World kits, you could just bolt it together and get a woorking but not good looking engien of you could spend time removing mill scale, machining marks etc and have a nice engine after quite a few hours work.
Edited By JasonB on 24/09/2012 19:52:09