This is one of my top 3 all time favorite devices.
*Adjustable 510 - it's not going to allow every RDA to sit absolutely flush...but that's what assorted colored beauty rings are for. I've even been asked for my autograph (several times) whilst out n about "peacocking around" with my beauty rings out.
* This was made for the palm of your hand. Love a trigger fire. It's so natural a movement.
* Over enthusiastic squonker? No worries. Just get your battery out and mop up. Never a chip to fry. No rice needed.
If you've ever dismissed the prospect of buying a mech because it's too confusing, it's not. This squonk delivers a smooth but fast ramp up. Not an angry arc-like zapper hit. Which brings me to the switch contacts. I can't find any arcing after 2 weeks straight every day use. (3 bottles per day usual)
My only regret is not ordering a 2nd SQ217 and a couple/few spare squonk bottles and bits. Next order for sure. This rig doesn't look like it'll be falling apart on my any time soon.
Last and certainly not least. Big Thank You, Signature Tips guys, sincerely, for continuing to make these devices available to those of us who appreciate the best of the best and so affordable. I see a resurgence of this genre of gear going on right now. It's been creeping it's way back for the last year, I think.