@Don Merz 070317 posted:Ugh--this is the kind of thing I hate--that is when a project stalls or aborts because of something weird--like Dremel tool failure! I've had to fix one of my Dremels multiple times. There are many different models so this may not apply to yours. But many of them have a plastic connector between the motor shaft and the tool head, inside the housing. If you open it up and see that, you can go online and order a replacement. Might as well get a spare too.
Those Gargraves 042 switches are strange beasts. I have several different Gargraves 042 models. I am not sure how that frog is supposed to match up with the track end. In the end, I gave up and went with a Ross 054. If you need one or more 042s, just email me and I'll be glad to supply them. I have a box of them (used and new) that I am probably never going to use.
Good luck Mark!
Don Merz
Don, Thank you very much for your sympathy and providing suggestions. I got on the computer to report in what I discovered last evening about the Dremel and saw your message. Mine is a basic two speed model number 285-3. Here is the photograph I took that shows exactly what you mentioned. The flex coupling as the parts diagram called it had crumbled. I made sure I dumped out all the little pieces and ordered a new coupling last evening.
I also connected temporary jumpers to all the power drops in my little three-track yard that has 2 GarGraves 042 switches, one RH and on LH. I was able to run an engine everywhere with not trouble. 
I have one more 042 LH switch I plan to install in the same location of the one I had trouble with and see what happens. I will report my findings. Garbage pickup is tonight, and the butchered troublemaker is already in the can. Many would say keep it for parts. I don't ever want to see it again! 
