Originally Posted by
jdrew1
IMO adding the spacer won't hurt you compared to doing the same cut without a spacer. That's the important part. Taking a cut at the same distance from the table, the moment arm is identical, spacer or no. The spacer will allow you more z for drills, chucks, etc, just don't try milling heavy cuts at the very top or you can expect more chatter. Just because you have the extra z doesn't mean you use it all the time.
In fact, the spacer may well improve the rigidity of the column when cutting within the original z envelope. Why? A length of hollow tube has now been replaced by a solid section. Considering only the possible flexure of the column of course and not bolts or the base itself.
Conclusion: I'd do it if it was my machine. I have the tilting x2 though so I have my own problems.