I was thinking more of the split between DCC accessory power and track power. Either using separate boosters or circuit breakers on the track to protect the command station allowing it to still change the point motors. Your sectioning make sense though. We've got 5 pairs of bare copper sub bus on slattocks approaching the junction - Bury up/down, rochdale up/down and the goods loop and we'll probably add one for our yard there too. These are currently powered off either of our two 5 amp boosters so the down and up trains cant short each other out. Its also how we've had DC on one circuit and DCC on the other.
The only issue i've had so far is Dick having a lose screw in the choc block on his DC controller!
I suppose you could laser cut mounting plates in a decent thickness of ply for the Cobalts perhaps? You may have to manually countersink them though.
I do think its an improvement even if you had been alright with your newer C+L.
Thanks for that, its a relief to have something to get back into after xmas. I'll be down in Cardiff Thursday for a decent break before I start.