HUMM, I like the idea of the snail drum also but like brass knucks I too am in CA and it's not going to happen. I could get one in OR and modify it to only hold 10? And look "tacticool"!
As for the mag problems I'm reading about.... I made my own follower for a 30 rounder I have and haven't had a problem one, Matter of fact I have tried the 450 round in every mag I have shingle shot follower or not and have yet to have an issue, Everything works great, I thought I would make a bunch of single shot followers but a buddy of mine said to try ALL my mags first and sure enough, It's not needed in my case. All my mags are old, Cheep (were cheep) steel, Milslurp mags that I put new springs and the green follower in.
Duno what I'm doing different, The thing will and has feed every round I've loaded into them.
BTW shooting 10 of these rounds as fast as you can is something that needs to be done by all 450 owners, Just thinking about it brings a smile to my face!