Which OBS? I have been using OBS productsfor over 2 years with no 510 issues.
Cirus 2 leaked any residue that gets under the deck from day 1 directly into the mods 510. Throwing it in a vice and finishing the press fit, adding some CA glue seems to be holding up but I don't trust it at all any more. Run into too many people with Engines (and even an Engine II more recently) that the positive pin/post just up and let go on to trust those either. So yeah my crius 2, engine and nano no longer have a good home unless you count sitting on the shelf gathering dust "a good home."
Hey bud. Your 25 is weepy? Mine was till I started using more rayon/cotton in the channels.
They put a bunch of metal under the deck they really didn't have to reducing the space under the air holes, then made the afc so it has a seam facing straight down - so even a tiny bit of residue after a few days wicks between the deck and mod and makes the afc itself a mess at the seams (since afc has no orings). I find myself rewicking it every 3rd day because I'm OCD about that sort of mess, just so I can rinse the base under the tap and get the juice out of the afc. So, I've had plenty of opportunity to try all sorts of wicking (bacon v2, bacon prime, muji, rayon), I've settled on a 3.5mm coil packed with rayon, rabbit eared and top 1/4 cut off rest stuffed/cut to the step on the juice slot. So far though (since I got it in November or so) it's been my favorite RTA, aside from that.
Either way my favorite tip for flavor on ammit 25 was the merlin 510 one which lines up almost precisely with the chimney bore... I'm hoping they were comparing ammit dual and not ammit 25 earlier in the thread for airflow.