Ken, do you have a link to the thread showing the oscillator and 2-ch relay modules you have? Also, I assume in your diagram that VCC is connected to +12V? And, is the +12V supply a wall-wart with the minus supply connected to track outer rail?
With the modules I think you already have in-hand, I figure some simple re-wiring with addition of a resistor and capacitor should solve the problem.
BTW, in your diagram, you show TRIG2 on the right relay module driven by the oscillator. I believe TRIG2 should be driven by the insulated rail? No matter - confirm what you have and I'll re-draw the diagram with the R and C to mask the intermittent contacts.
