Cool. I ordered two Zippy 2200s and these:
https://hobbyking.com/en_us/xt60-to-tamiya-battery-adapter-2pcs-bag.html to put my Command Control into operation for our Classics launch next month.
It looks like you found some less-expensive adapters (well, three instead of two for about the same price). All my more-than-10A airplane stuff has Anderson Powerpoles (which started back when the late John Sermos was marketing them to electric RC airplane guys with his name on them as a way to get power-wasting Tamiya plugs out of airplanes).
When I pretty much dropped out of airplanes to get back into rockets it was just when the various flavors and sizes of bullets, plus Deans Ultras and AstroFlight's proprietary connectors were all choices....but before there were XT-anythings from HK. I went looking for some XT-60s to make my own adapters (I have a few of the Tamiya plugs) but decided to just let HK make 'em for me.
Glad you have a good charger. That's really the most important piece of the entire LiPoly puzzle. And I'll bet that they've gotten consistently better than the early lithium chargers that I used to test and write about for RC Groups. Long ago I had a column called "Recurring Charge" over there - before the Ezone site was kind of phased out and all articles were just stuck in the discussion fora.
The instructions for the Command Control imply that you can fire a four-Solar-igniter cluster on one NiCd pack. If that really works, then one modern LiPoly would do it, too. Using both should pretty much melt those suckers.
That's a cute little low voltage alarm. Based on my experience launching rockets with my old Kokam 3200 packs, you'd have to launch on the order of a couple of hundred rockets before something like that would be needed. But it can't hurt.