Very nice.

The driving wheels look similer to BR78.

Just as well you did refuse or you would have been eating grapes in Hospital for months. But then you have mother on side.
Maybe she would run interferance for you.

These rails are 3R from Paul Tourelle who made firstly on the 50s earlies 60s HO 3 rails with central rail and real wooden sleepered at the dimensions you asked (if you want a 6.5 turnout or a 2 meters radius curves for exemple), my layout since I was a little boy was and is still whith such rails (no pictures as it's actually sadly on my daughter's cellar). Then on later 60s he made those pastic rails still 3 rails and reproduction of real ones iron concreted sleepered.
I collect also tracks only 3 rails on HO OO and like to put pictures with these unusual, ever for froggies, tracks.
Still sadly miss in my collection Buco 3R tracksand Lionel OO 3R as I own the Lionel Hudson OO and the boxcars , cabooose and so on
BTW, Jep made in OO HO two kind of tracks, metallic rails with central rail and the same geometry than Marklin 3600 5100, then, at the end of the 50s plastic rails with a central wire