In digging, it seems the biggest way I've seen to tell the difference is in the spindle stroke. The RF30 appears to have around 130 mm or ~5 inches, and the RF25 appears to have around 95 mm or 3.75 inches of spindle stroke.
This mill didn't come with the tool to tighten the column bolts, the one that looks somewhat like a lug nut wrench. Anyone know the name of this or where I could get a replacement? Best I can tell, it uses a 15/16 bolt head. Are they all that size or ???
Another thing, I've seen adapters for Bridgeport style machines to use a drill on the knee handwheel. Bridgeports seem to have a 9 spline 'handle' whereas it appears the RF style have a 3 spline? Does anyone know if anyone makes an adapter to use a drill like for the Bridgeport?