The Checkmate is my favorite two-stage 13mm motor rocket, and the MultiRoc is quite capable in several different modes. It’s another favorite of mine. If I didn’t already have multiple backup kits for these I’d be getting some on this sale.
I have not (yet) built the Low Boom SST, but one is a regular at my club launches and always turns in a nice flight. I do have one kit on hand as well.
So several someones can get a great deal on any or all of these at Chris’ store.
(I am a very occasional customer of Chris’, no other relationship….)