I use Schaller locks on all my basses. However, I rarely use the Schaller supplied screw since it's always smaller than the stock strap button screw and will eventually pull out or bend. I just drill out the hole on the Schaller button to fit the stock guitar screw shaft and then chuck the shaft end of my stock screw into my hand drill and grind the head down a bit so the stock screw head fits into the Schaller button recess. You can use a grinding stone or sandpaper if you want but I find that just a quick touch of the head against a concrete patio is enough to reduce the head diameter adequately.
I also find that many of my leather straps are too thick for the nut to get a good bite of threads on the Schaller saddle. To solve that problem I take the strap out back onto the concrete patio along with a ball peen hammer and give the leather a few hard whacks where the strap lock will be mounted. This temporarily compresses the leather enough to get at least three good threads through the nut. Also remember it's critical to position the open end of the Schaller saddle such that it faces straight up while the bass is in the playing position. Once you get everything where you want it just put a drop of clear fingernail polish on the threads protruding from the nut, that will keep it from ever getting loose on its own.
Couple excellent pieces of info thank you! The ball peen hammer never occurred to me, I usually try to widen the hole in the strap with leather scissors and an exact-o knife, when I have it wide enough, push the washer and nut down far enough to catch a thread then tighten with pliers, it's a struggle. The nail polish is a good idea too but I'm wondering if Lock-tite might also do the trick? Anyway, thank you for the ideas!
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Fair price as in going rate. What have people around here paid. I'm seeing a number of completed listings around the $800 mark, just wanted other peoples opinions.