There's an on-line auction for a Bridgeport seven inch column riser. I plan on putting this on my Excello CNC knee mill. Right now, I'm the winning bidder at $300. More than likely, the price will go on up.
Two related questions. Will rigidity suffer due to a riser block? This machine is WAY better than a bridgy in this regard right now, but I don't want to compromise it.
Second, I really only need a four inch riser. I could have this burned out of steel and make my own for less than $300. Do I lose more rigidity with steel vs. cast?(I think so) I think I gain rigidity by going with 4" vs. 7" riser, will this make up the difference?
Karl