We need to add in house OD grind capability, we make lots of nitrided bushings, valve stems & pins, and 60% of the stuff goes out to grind prior to Nitride. Low quantity high mix work. We have a Sunnen hone, works great for the stuff we do, so do not reccisarily need ID capabilities on the grinder. Basically first concern is dust control, second concern is budget. What are my options with a say 25k budget? (obviously used). Is a DRO a must? Does coolant knock down most dust so its not really an issue? , assuming anything enclosed is out of budget.