Dallee #617 indexer ?

I had the same problem!  Turn the speed down,  mark it on your HO Xformer & always use that speed (where it works best)!  I used stripping tape ( I think 1/16” wide) available in most Hobby Shops!

Problem solved& still working today!!

From Fred's comment, sounds like around .060" is the right width.  FWIW, I think most optical sensors would be somewhat flaky with a .015" strip, at least in my testing of my Chuff-Generator, skinny stripes like that caused a problem.

Thanks for the replies guys. I'll start with .060 and see how it works out. I've got some white 3/8" right angle vinyl trim that should work for this task. If not I'll try Fred's stripping tape idea (thanks Fred).

As far a turntable speed is concerned I've got a plan where I'm using a PC power supply to power the table along with some other things on the layout. I'm going to wire in a one of those buck/boost converters with digital read out so I can dial in a speed that works best.

I seem to remember that a bent paper clip would work.  Bend the paper clip so you have a pin at right angle to the remaining clip. Screw the clip to the rotating base.  Adjust the clip pin to achieve alignment.  Always seemed to me that a set of adjustable alignment reflector brackets would be a wonderful addition to the indexer kit.  My turntable indexer has been installed for 20  years but I've never installed the detector/reflectors due to the effort involved with alignment reflector fabrication, installation  and alignment.

I keep looking for an encoder based indexer as a replacement.  There are a couple on the market that I'm aware of however neither are drop in kits that support "stop anywhere" control for my Bowser table.