Last night I wanted to check out my new Celestron Ultima LX 22mm in my 6" Omni XLT-150 newt. I popped it in the 2" crayford focuser and it wouldn't come to focus. No problem there, I went inside and grabbed a 2" extension tube. I was now able to reach focus but when I took my fingers off the focuser dial the drawtube slowly crept back down and I would lose focus. I tried adjusting the tension on the focuser with the set screw to see if that would help, but that didn't really work. I then just thought I would completely lock it down with the set screw when I got to focus, but as soon as I tried that and let go it would fall out of focus slightly.
I'm wondering if there is some sort of adjustment that can be made to the stock crayford focuser to help it handle the weight of the eyepiece and extension tube or if it's time to invest in a new focuser to handle these heavier eyepieces? I plan on purchasing a coma corrector eventually and know this will add more weight as well. Any insight would be much appreciated. I've attached a picture of what my focuser looks like below. Thanks in advance!