Releasing a B8-0 is a good idea technically. Not so sure about marketing.

Having a B4-6 variant of the C motor would be an interesting market test and perhaps should be released with no 0 or 2 delay at all. The B4-6 was a major go-to motor for our entire rocket club of 500 members and certainly is justified to be re-released. 4,6

The C5 was a Centuri thing for the fantasy series die cut kits they released. Centuri was not offering 24mm motors at the time which would have been better motors for those rockets.

All of the above except a C4-4,6 would use existing tooling. Perhaps it would use B4 tooling and be produceable.

One advantage of the current system is reduced confusion and reduced retail SKU's. Those are significant positives for the sorts of consumers Fred runs into all the time. People clueless as to WHY you would want lower or higher thrust or delays. Just plugging in what the package says. And not having too many surpurfluous choices allowing a wrong choice out of ignorance. Even GH complains about not being able to get all wanted motors locally now.

If the catalog reintroduced the why of average thrust selection and delay selection then some of these choices might not only be welcome, but successful among a market that is 60% newbies.

Jerry