Originally Posted by
mtylerfl
Makes me nervous that someone would file down those tabs. Mine fit snugly and are a perfect fit. It's supposed to be that way so the jig is nice and stable when the head is lowered. Be absolutely sure you have actually positioned the jig properly before making any modification as drastic as filing something! Those two tabs have screws and elongated adjustment slots. Perhaps one or the other was 'canted' a little left or right from perpendicular. They are adjustable because you do have to do the alignment procedure using the small grooves on top of each side panel as a guide. The complete process is described in the video. I had to loosen the adjustment screws on one side and move the tab very slightly (about 1/64"-ish). This yielded a perfect alignment. No filing required.
Floyd, the jig panels sit raised slightly above the stationary and sliding plates, as Dan mentioned. No worries, this is by design.
EDIT: FYI...I just measured the width of both my tabs with digital calipers as well as a metal ruler. With the calipers, one measures 0.624" and the other 0.623" (essentially 5/8"). Using a metal ruler, it looks like both are dead-on 5/8" (0.625").