I used an insulfrog short diamond, and the layout was DCC, the only locos that ran over it were Bachmann and Hornby 08s none had stay alive chips. But we're sound fitted.
The idea to use the insulfrog was to keep wiring simple as I only had two wires feeding the layout through the centre point,
The problem came from the wheels of the shunters arcing across the track elements of the diamond.
It was annoying as when the loco crossed the diamond it shorted and the sound was re booted, it could be overcome with speed, but it looked a tad daft with the 08s throttling around at far to an excessive speed.
It was cured by painting nail varnish gloss enamel over the offending bits of the diamond to extend the insulation from the wheels.
This worked, but at each exhibition when the track was cleaned, the diamond needed to be re-insulated with the nail varnish.
The layout was sold on to a modeller who frequented the local model shop, but to my knowledge it hasn't been exhibited since.
The size was the problem for storage, it sat on a single board 1200mm dia. Which could be stood on its side and the plant building lifted straight off to allow cleaning,
In a nut shell, Liz said NO. When I moved in with her, the train set wasn't.
Is the tolerance Mrs SG uses available over the counter?