Dave wrote:

As far as what I am attempting to accomplish
I am obviously verifying the part is flat on the table or checking
differential heights on the workpiece.

Dave:

As others have pointed out, a mag base holder isn't the "proper" tool
for the job. But if it's all you've got, you could magnetically mount
it on a small flat plate of steel (something dimensionally like 4" X 4"
X 1"), or anything reasonable.

--
BottleBob
http://home.earthlink.net/~bottlbob