I have a Workmate 550 for which I made a new center table piece out of oak and fitted it with a machinist's vise. It isn't terribly stable and I wouldn't want to try debreeching a barrel in it, but it fits in an apartment kitchen and the ability to swap between a cabinet-maker's configuration (as it was originally designed) and the vise makes it pretty versatile - I've made and fitted gun sights, inletted small parts into gunstocks, scratchbuilt model train cars, made a complete dagger and scabbard, did my fist set of dovetails, jointed long boards that eventually became shelves, and worked on powderhorns on that bench, just off the top of my head.