Since most all wire Kanthal or Ni200 comes with some kind of industrial lubricant on it and gives a bad taste for the first few puffs, maybe a wire cleaner. I wash mine by hand with simple green and vodka as I stopped firing coils until they are red hot to carbonize it. I've seen people post in other venues that they wish someone would sell pre cleaned wire and that they would pay a little more for it.
A coil winding jig that made perfect coils of variable diameter either contact or spaced either CW or CCW by just turning a crank. But just as easy to do by hand with a cheap drill bit set. Sounds novel though.
Though I have no issues with Ni200, many find it too soft to work with and work harden it by hand. I can't imagine that is fun. So a hand crack device that work hardened wire may be useful to some.
One tool that I did make for myself with thin wall small diameter tube with one end flared for making silica builds. Start the silica in the flared end and twist and push the silica through. Wind coil on the tube then slide the coil off the non-flared end while pulling the wick through. Got tired of poking myself using the needle method.
A device in line with the 510 drip tip that read vacuum, temperature and flow rate. Not sure how popular it would be but seeing how we like to brag about watts then we could post and brag about how we suck. LOL Sorry couldn't resist
For several attys I really wish I could find thin small OD washers for 2mm and 2.5mm post screws. What I can find readily available have too large an OD. With two washers per post and wrapping the leg wire around the screw between the washers would allow tightening the screw without it pulling on the leg wire.
And for those attys that have leg capture ie a hole through the side of the post, everyone of them has the hole drilled too deep so that tightening the screw almost always results in cutting the wire. I trim a piece of SS wire and sand each side to make a tiny button that I drop in the post screw hole to fix that. Plugs the bottom of the hole that was drilled too deep so the wire sits flat on top of the button and gets pinched when the screw is tightened instead of cut.
A caddy or stand designed for 510 attys so they can sit upright and accommodate 10 or 20 of them for both 18650 and 26650 sized attys ie ~22mm and ~30mm sized attys. Not a novel idea and easy to DIY.
I use a standard pencil eraser to clean electrical contacts, the green erasers work best, but are too big for inside a 510. And a q-tip only works so good. I have used an eraser pencil but kind of a pain to use inside a 510 by hand. So a small diameter eraser that maybe could mount in a cordless drill would make polishing and cleaning the 510 center pin in your mod a snap. Somebody probably already makes those but I haven't looked.
