Well I think I have finally tamed the beast (touch wood)!
What I did was push the deck down as hard as I could so the posts protrude a mm or so above the deck (deck will probably never come off again now though) add a couple of the extra o-rings to 510 and then fiddle with the 510 pin until you find the perfect spot. on my Squape R it really has to be in one spot, a turn of one degree in either direction will mean a dead short or unstable resistance. I was tempted to thread lock it into place but I would have to find "the spot" again and it would probably ruin the conductivity.
It does seem to be a rather strange thing how accurate the 510 screw has to be.
I now have it with a .6 ohm coil wicked with rayon on the IPV3 and its is staying steady as rock at .6 and vaping like a champ at 15watts!
I doubt this will last as it has a mind of its own but I will not fiddle with it or even rewick until I really have to, and it has been relegated to regulated devices only, just cant trust it on a mechanical. I wlll post again in a few days to let you guys know how its going. I hope everybody else that was having issues with their device can get it sorted too!
All the best and I hope this is useful to some one.
Until I replaced the factory 510 pin with a machine screw, I had the same issue. The pin had to be in the perfect orientation or it would jump resistance like mad. Now with the machine screw and insulator, it's rocking and rolling.
I think I finally got my wicking issues resolved as well. My first several attempts were with rayon and it ran great for a few days and then start dry hitting. I re-did several rayon wicks but still got some dry hits. Tried more, tried less, tried shorter, tried longer and finally gave up and wicked it with KGD. Not a dry hit since. I'm no stranger to rayon - all of my attys have been wicked with rayon many times over. I guess the SqR just had to be different, lol. I will say though that it vapes very, very nicely with the cotton.