Actually, your #6 switches will likely need the relay switching to accommodate many locomotives. I don't know of any engines with one roller, those would stall on virtually every switch on the planet, I've never seen a switch that doesn't have some kind of gap in center track coverage. I'm not sure what a #11 switch is, are you talking about the Ross #100/101 Regular 11 Degree Switch? Those are less troublesome, I don't have relays on those and most of my stuff makes the transition. I also have the 14 degree 200/201 switches, those are no problem as well.
Thanks GRJ, yeah it is the 11 degree switch. That is the kind of advice that is valuable, I'll order the relays so I have them when the time comes to wire this.