Thanks Bruce and Steve.
Hi Bruce, I originally had an adjustment wheel in the center of the fence  and attached to the back of the fence  on the back. Backlash drove me nuts so I scrapped it and with this indicator  I don't have to use a piece of scrap to check the next cut. It is there where the indicator says it moved to! The idea is not to use it to make a dimensional cut in the first place. It is used to make the adjustment to the correct dimension after making the initial rough cut.

Hi Steve. I do use this drop indicator on the table saw too. Sometimes I have to put a block under it if the blade is higher than its range

Cheers, Jim ........................ Variety is the spice of life...............Learn something new every day