Luckily, I got the tape measure out last night.

I can't fit anything bigger than the standard Bridgeport in! That only fits because the head is between the roof trusses, so that rules out practically all others I think as even an Interact is 90" tall which i think is 12" more than a standard machine.

So my options now seem limited to converting my own BP, buying another BP and converting that then selling my on on or not bothering.