I am never in a hurry on any of my builds and have a pleasant experience with C6; I got mine in 4 months per my invoice. I do not think many people know this. C6 barrels source their barrels to McGowen to be carbon-wrapped, so there are two operational business entities that an end-user has to contend with unless C6 already has the item in their inventory when orders are placed. IIRC, I did a status check halfway through to see if the expected delivery schedule was still on target. It was in 2022, but Gene Gordon was extremely helpful throughout the process.
Although they do not usually let it be known, most companies have an internal prioritization business strategy/process like most in the industry, i.e., first come, first served, full payment versus % of deposit, etc. My go-to GS does similarly - in ideal conditions, with all components on hand.
1. First come, first served - full payment.
2. First come, first served - partial payment.
3. In good faith - no payment.