May have figured this one out watching a video...is it the tool coordinate system that you change? For example I have 20 tools in my tool holder with the correct offsets, power up the machine, use a tool to set height on my part in the vise, then change a master tool offset which adjusts all of the others? The way I see myself using the machine is not replication of parts, but more prototyping...so I would have standard tools in the machine....