220
Currently got this one on my work laptop. Model M terminal board with internal converter. The only layout changes I made versus a normal 102-key are that RCtrl is is a Windows key, and the four keys along the right side of the numpad are =, -, +, and the normal Enter.
I also work both from the same desk. I keep the home keyboard and mouse on a deskmat that I just slide the very edge when work actually needs my undivided attention. The Model M's don't come out to play too terribly often, and most of my weird little "1800" layout variants that I make as a hobby take up a good deal less space. Still, sometimes you just need some pingy buckling spring goodness in your life.