I wanted to turn an S2+ into a triple today, but didn't have a spare spacer, so i made my own with washers from amazon (https://www.amazon.com/gp/product/B07HD9PBHL/ref=ppx_yo_dt_b_asin_title_o08_s00?ie=UTF8&psc=1 for $13), since it had the sizes i figured i'd need. Originally got them so i didn't have to sand and drill through mcpcb for my e05ti, which was a huge pain (https://www.reddit.com/r/flashlight/comments/ttsi9f/nmd_made_my_e05ti_into_a_triple_with_the_fwaa/). I'll probably replace that one, or just do it for my second if i decide to turn that into a triple, too.

These max out at 18mm OD, and i would have probably preferred 20mm OD, but these interlocked and had the 12mm and 14mm OD i was actually looking for.

I stacked them, touched solder to them as they heated up, and just went until i got to the right height.

The mtn aluminum spacer measures at 5g, 20.2mm on the top, 15.8mm on the bottom, and 7.2mm tall. This one is 12g, 18mm on top, 16mm on the bottom, and 7.2mm tall.

Original plan was to use one for a 219b sw30 triple, but i couldn't get the damn driver retaining ring off. Instead, to validate that it works, i replaced the mtn aluminum spacer in my 219b sw45k triple s2+ with it, and it's working great so far!