I have a couple 1970's-1980's Lionel O-gauge sets from when I was a kid (with standard 3-rail track) and a 1st-gen Polar Express set I bought my son last year (with Fastrack). While looking for more track in general to add on to those styles, I ran across someone locally who has a lot (and I mean a LOT) of MTH Realtrax sections for sale. Hundreds of them in all varieties. So if I take advantage of this and grab a collection of MTH track, are there separate power connection tracks for my Lionel transformers? Or can they be wired up to any section, with any particular connectors? Newbie question I know, but I have no experience with MTH Realtrax... having only read about it here and never seen/used it in person.
EDIT: Also I see MTH has adapter sections to run Realtrax into old 3-rail and vice versa. Is there anything that will adapt Realtrax to Fastrack? If so, that would actually solve my problem because then I could use all three styles together. But I'm guessing that's not the case MTH and Lionel are obviously different companies.