> For 5 units of 2 or 4 layer turnkey assembled boards, so long as you fit in the Grid Proto spec it's a little bit more expensive (not 10x, more like 1.3x)

Does that include the cost of parts? One of the issues I had with sourcing prototype PCBA's in the US is parts are much more expensive (not 10x, but also not 1.3x).

Yep that includes parts.