Although I did order driver from Jaxman, I don’t like the mode spacing so I used FET + AMC driver (with Anduril) from Lexel. It has a 20mm driver at the moment which works but the tube will not screw all the way in since the driver won’t fit where it’s supposed to. It’s better if you use 17mm driver, it has a retaining ring for that size driver. There are a bunch of 17mm e switch drivers other than Jaxman’s that I know of like Qlite momentary or FET 1 from Mountain Electronics or FET AMC from Lexel here in BLF. Jaxman also did not send the switch with my order (not sure why since the description says they send the switch with the driver) but I did have an extra switch lying around that I used. Maybe you should make sure with Jaxman.

For the triple I tried with kaidomain and noctigon triple mcpcb and they’re a little bit too large. You can always trim them down using sandpaper or such to fit. The triple mcpcb from Jaxman (I took from E2l) fits perfectly. For the OP type any 16mm mcpcb should fit. The 18350 and 18500 tubes for the E1 are available from Jaxman. For the skilhunt H03 the 18350 tube for the A6 which I bought here a while ago fits perfectly. I just needed to put some thin o-rings for waterproofing.