Was on vacation came back to read all this thread, sorry this got so out of hand. just to put some things clear.
1. I already use mechs, not asking here if If I should or not.
2. Though I don't think I need to argue why I prefer mechs some of the time (the silly comment about the beating boyfriend), For me it has to do with the feel of the tube, the mechanical button, how it hits on a fresh battery (yes a 300w mod will hit harder but i said how it hits not how hard), form factor is important to me.
3. Reading through your comments all of you are much more experienced than me and I respect your opinions though because I only used the broadside till now (in the mech world) I always felt a little safer because of the non hybrid top cap (which is one of the reasons I wanted a mech with one), though it will only maybe guard from human error, I make mistakes like anyone, besides i have had a squonk 510 pin break while screwing down my atty on a dead rabbit which kind of freaked me out, even though it wasn't on a mech at the time (and no i wasn't trying to torque it like crazy).
4. I have about 20 something RTA's and RDA's ad to tell you the truth most of them only about 30% of them I know are hybrid safe or not, most of them for me are in the middle, pin protrudes, but since I never used a hybrid I am not sure it's enough, no matter how many youtube videos I watched (hundreds) I still can be sure because I have no experience with hybrid mechs, and watching videos most have a macro lense or extreme close up on the pins and I just cant gauge the amount on my pins since im near sighted , to make things worse some reviewers have reviewed products which they state have a safe 510, but the same product that I have bought the 510 is nearly flush (plenty of examples of this also in online images)
for all these reasons I would prefer just to take the voltage drop hit, and use most of the RDA's and RTA's I bought and like on a mech tube without fearing from a hard short because I miss judged the 510. I don't build that low > 0.2 ohms and the broadside was hitting plenty hard for me, my main issue with it these days is only battery life, that's why I was looking for a 21700, a lockable switch would be a nice bonus, and the isoled sleeve is actually something I really want if I need to use positive down on a mech.
so after looking for a while I did realize that what I'm looking for doesn't exist, so closest thing i found was the Nato mod, which the most important features, and sadly I really don't like the form factor, which for me is important in my mech. So the options now are to stay with the admiral and carry around 4 18650's every day I leave for work ( I don't always use all 4 but since I stopped smoking 2 years ago one of my biggest fears is being stuck with no vape for a couple of hours ). The other thought I had was buying a kennedy vindicator and just take a "chance" on the 510's I think are protruding enough, and are static or can be screwed out a little safely (btw I say a youtuber that uses a small rubber o-ring in the 510 to make it protrude out just a little more, seems unsafe to me but do you guys have any thoughts on this?) Or just buying a ruby 21 and just building high and spacing the coils so I will not need to worry about the hybrid top.
Would appreciate any advice.
p.s.
I just realised, if OP was hell bent on his requirements (and I'm being very sincere in this) he could always make his own. Get a mini lathe (damn I cringe whenever I see one), buy some bar stock (copper or brass would be easier to machine), and he can turn the tube itself, cut the screw threads for the 510, and find his favourite screw in button to complete the circuit and HEY PRESTO.
I admit i had the same thoughts, and am trying to source a mini lathe but this is a long term project which will take me some time. I would love to be able to solve this issue sooner rather than later since this is a hassle. But kudos to you sir for the best recommendation in this thread so far
Thanks,