Hell's Island DSOD, Solo, No (AI, Downs, Converts, Deployables, Assets) [Payday 2]
That's the closest completed run I've probably ever had in any heist. I literally had 0 seconds left and my health was barely visible, would've probably been safer if I realized I had a Pocket ECM left.
I abused a glitch that only works if you have to go through the canteen where you can jump over the gate by jumping on the drillable door as the gates don't seem to have any collision at the very top. When you do that the turret seems to not spawn which makes this heist a bit more convenient. I didn't find this trick by myself and got told about it by Carrot who's a really great player and produces some really nice Payday content so go check him out if you have the time: / @carrotisbad
If you don't get that door though there is a very convenient trick aswell where you just run back to the keypad room after placing the drill as all the enemies behind you will have despawned and all the cops trying to get to you will get killed by an invisible barrier. The cops won't stop the drill at the door so you can literally just wait it out and go back as soon as it's done and use the keys afterwards. Afterall the glitch helped me speed up the run and avoid the turret but that's about it since I would've done the trick described in this paragraph instead if it wasn't for the jump.
This heist was extremely painful to do since there is basically no cover and it takes a huge amount of attempts to get past the gate since you need to get 2 sets of thermite paste. This part would've been alot easier with 1 set of thermite paste since the vast majority of my fails have been from trying to get the second set. In addition to that the ending was a huge pain since I had to get to that part 5 times before I could start the hack a single time. In each of the other 4 attempts in which I got to the boxes I had bad RNG and a box which was in the open and there was no way to start the hack without getting killed so completing 80% of the heist just to realize I can't finish it was super frustrating. I don't think I'd have given it another shot for quite some time if I didn't get it the attempt I finally got a good box.