Thanks for chiming in guys.
Answers to points raised:
Yes, the memory lock is an afterthought, & I agree, a fully integrated mechanism would be very cool. Perhaps in the next design phase, but right now, it's what we've got.
Wing nuts - we deliberately avoided those for a number of reasons. Remember, this is aluminium we're working with. The entire focus of our drum designs is sound, so low mass to us is number 1, 2, & 3. Aluminium wing nuts aren't viable mechanically, so a resort to steel or stainless steel would add considerably to bracket mass, probably up by 50%. Additionally, these brackets are very low profile. So low profile in fact, that our bass drums readily fit one size down in cases. Wing nuts would negate that benefit too. When you haul a 22" Guru bass drum, you're hauling a 20" case, & it's typically the weight of an average 16" floor tom (depending on wood species)
Setup time - I set these up all the time. The bracket top plate is spring loaded so opens up immediately. I only ever operate the top two screws, not four. We were quite rightly brought to task over not having memory locks, as that increased setup time considerably. Now, with memory locks, it takes me 10 seconds/side longer to set up these spurs compared to wing nut flip out designs. That's 20 seconds at a gig. Sorry, for a drum company that's utterly focussed on sound quality, 20 seconds isn't even on our radar compared to the sonic & hauling practicality benefits of the design. Don't get me wrong, we want our drums to be completely functional pieces of gigging gear, & they are, but we never compromise on sound for a minute degree of convenience.