Thanks very much to CandO for the extremly useful suggestion. My Culvert Loader / Unloader is Command Control. I use MTH DCS with Lionel Interface box so it works exactly like the Lionel Command System. MTH DCS Triggers the accessories perfectly. My only issue is the loader dropping culverts about an inch off the car & onto the tracks ( vs. in the car ). CandO suggestion to move the Cherry Switch a bit might bear fruit. Anyway: I will try that to see if it helps. Lionel should (my opinion) provide written instructions & an easy adjustment feature regardless of track used.
It would seem very simple & not costly to do that. I have seen numerous articles over the years complaining about the same problem I'm having. Why ignore your customer base ??
Just as an unrelated aside: In general I love Lionel Fast Track & Fast Track Switches. However, many of the older Lionel Accessories (to include reissues) were designed for O Gauge Tubular Track. That means (in some cases) you can't get accessories close enough to the track ( barrel loader for example). All Lionel has to do is produce a Fast Track section with half the roadbed removed. Their solution is to advise customers to saw off half the roadbed with a hacksaw. Naturally, I have done that but it's a bit of a pain. Fast Track has numerous more difficult pieces covered. Simple 10 inch straight with half road bed removed is not covered. Amazing that such a common problem with simple fix is ignored. I'd have been happy to pay 50% more not to trouble myself with a hacksaw. Suspect I'm not alone.