Is there any provision for sending components that I either already have in stock, or that require 'exotic' sourcing, to the assembler? Or do I have to add them by hand after I get the boards back?

Also, my Altium parts library has a non-standard name for the manufacturer part number field. Hence most of the parts list didn't automagically populate for my approval. Would be nice to be able to teach Circuithub what field to look at.

Can you do basic mechanical assembly on the board? (stickers, press fits, nuts n bolts, install jumper blocks, etc.)