I don't actually intend to buy one, but more than a year ago I spent some time researching it, and it went like this:
FX Maverick - but way too many o-rings. FX Dreamline in .30 with 30cc extra plenum and more barrel bands, but still maybe too much work to get the power up etc. Maybe Evanix Rainstorm, but magazine looks flimsy. Or Sumatra 2500 - but that's getting too big now. And at that point I stopped researching it and moved to other things. I'm still curious if I haven't missed something (which also isn't too expensive, like the Huben K1).
FX Maverick - but way too many o-rings. FX Dreamline in .30 with 30cc extra plenum and more barrel bands, but still maybe too much work to get the power up etc. Maybe Evanix Rainstorm, but magazine looks flimsy. Or Sumatra 2500 - but that's getting too big now. And at that point I stopped researching it and moved to other things. I'm still curious if I haven't missed something (which also isn't too expensive, like the Huben K1).