The 18 x 70mm WL Q-jets were announced at NARCON-2020.

yep, I coulda tol' ya that!

NARCON 2021 18 x 88mm SWL Q-Jets Full 20 N-s D, and a cheater E. :D

There I helped with the Press Release 2021.

It would be long enough for a fairly cool slow green . . . . SMG

This is really great news. I do like the current fast blackjack q-jets a lot. I think they are a a great alternative to black powder, and the way they fill gaps in what is a available for black powder is great, I like the sound and exhaust, and ignitability is great.

I prefer ALL OTHER Aerotech propellants over Blackjack and Fast Jack.
Not a big fan of the black exhaust.
I like Mohave Green best, closely followed by Blue Thunder which is about the closest to original Enerjet composites.

Any chance of getting Mohave Green in 18mm SU/RMS or 24mm SU/RMS ?

The green color in an 18mm motor would likely be washed out and nearly invisible. Plus I do not believe they would be covered under any of our existing DOT approvals.

I also love the progressive thrust curve of the Cs and Ds which again fills a niche.

I was going to ask if these White Lightning Q-Jets would have a progressive thrust curve as well....

They do.

Progressive curves in model rockets of this class is a feature not a bug.