With the weather changing (humidity up) I've found my string height has recently risen perceptibly, enough that I thought I'd lower my adjusters for the first time ever -- on a one year old Christopher carved, lots of work done on the bridge by luthier a year ago, including removing material from the bridge above the adjusters to facillitate lowering, as there was no room to lower the bridge with the factory adjuster setup. After loosening the string tension(s) a turn or two, I turned the bass-side bridge adjuster, say two or three quarter-to-half turns. All of a sudden... Whoomp! The threads in the upper section of the bridge "gave" -- stripped a little, it seems -- and the (remaining) string tension "pulled" the upper portion of the bridge down flush on the adjuster, as if it were at its lowest "setting." After marking the position of my bridge feet, I further lowered the string tension, allowing for pulling the strings off the bridge (to the sides) and removed the bridge and feet for inspection. The (Christopher factory) black (aluminum?) adjusters will both "catch" -- engage the threads -- all the way on the bridge's treble side threads. Neither adjuster will *fully* engage the threads in the (seemingly newly partially stripped) bass side of the bridge. They turn, as if the threads are working, until a little pressure is applied, then they "slip" or give, going to the all the way down flush position. So my question is; how has this thread-stripping problem been dealt with by others, particularly our esteemed luthiers? Is there a reasonable "quick fix?" I wondered about plumbers' silicon tape, in that it wouldn't seem to do any permanent harm. Am I gonna have to spring for a new bridge, or is there a reasonable repair for this condition? Yes, I'm gonna call my luthier, but I wanted to tap the experience and expertise on this list too. Thanks in advance.