We S gaugers who purchase Lionel Legacy engines are apparently fortunate. All S gauge Legacy engines beginning in 2013 are DCC compatible.
Before all you 3 rail O gauge operators jump into the DCC pool be aware there is currently no way to fire electrocouplers with DCC. In S gauge that is not a big issue since most DCC operators replace the truck mounted electrocouplers with body mounted Kadee's. That works in S because most engines/tenders now have pads for mounting the Kadees. It also works because the minimum track radius made in S is the equivalent of O-54. We can run 40' to 50' freight cars with no problem but not passenger cars. I doubt anyone can run body mounts on O-31 track. I found the minimum radius to use body mounts on passenger cars (21" for O gaugers) is the equivalent of O-84 with generous easements.
If the electrocoupler is replaced with a standard high rail KC then no problem.
