I just bought all of the Barracuda resin for the 1/72 B-1. I also have the full compliment in 1/48. A huge short coming of these kits (especially in 1/72) are the weapons bays. Particularly the rotary launcher. I've done a fair bit of scratchbuilding and I'm prepared to go that route with plain styrene. There are a lot of repeatable parts on each launcher and the margin of error is pretty small. It'll be difficult to make exact copies of multiple identical parts.
This leads me to consider designing the parts with a CAD program and send out to be printed. I know 0 about the