I used the S11C with S2 baton clip while camping all last weekend.
Worked great for me, but low is not low enough.
I’ve searched quite a bit but I’m not finding many details on S11C mods. I guess I’ll have to start by disassembling one to find out the driver diameter. If someone knows a good replacement please let me know. I really just need an additional mode that’s lower, but as long as it has memory a more complex UI would be ok.