My comment wasnt meant to be snarky, it was meant to be helpful. It is easy to misinterpret text man. I have no idea whether you know to use your thumb or not and have no idea how strong your hands are because you didnt say either in your OP. I gave you a number of different options to help with your problem. I could have not tried to help you at all

.
The 4 sheath doesnt have an adjuster screw like the Junglas. It is the same as the 3.
I have had no problems with the retention on any of my Esee's and I have had several. But, I do like firm retention for the reasons I listed in my OP. Maybe the Esee molded sheaths just arent for you. You could always try a custom Kydex/Boltron or leather one like I suggested.