To overcome a similar problem with a Durst M601 I had a wall mounting bracket made, the column is attached to this and not the base board, and I have another smaller bracket at the top to hold the column steady.

My older Johnson's 5x4 with a Devere Cold cathode head is bench mounted 8" in from the wall. The front 3/4s of the bench can be removed and slotted into two lower positions. This works well for both enlargers for large prints.