If you read the Domore manual i posted it bolts to the compound it also show angel to compound for feeding.
How many of you have toolpost grinders? This seems to be a misnomer, because 90% of what is available requires that you remove the topslide and mount the grinder to the compound rest. They don't really fit on the toolpost at all. What do you use them for? How often do you use them? Every once in a while I get the urge to buy one, but honestly, the only thing I can think of using them for is to part of sections of cast iron tubing to make piston rings, or to grind the face of a valve. I don't generally have problems with valves not sealing although the quality of a tool turned valve face looks fairly horrible under magnification but proper lapping into the valve seat seems to work good enough to make the valve seal well. I can't really think of any situation where I would use inside grinding capability. They range in price from $200 for the Little Machine Shop style, up to $3000 for the Dumore brand.---Brian