question about Leigh D4 jig fingers

I'm trying to get set up to cut end on end dovetails with my Leigh D4 dovetail jig. I read the book on setup, then I re-read the book on setup. Thought about it for a couple of hours, then re-re-read the book on setup. I got the test stock prepared and set up the jig to cut the tails as it says to do. I tightened the fingers pretty snug, but didn't want to overdo the tightening. Ok, so I cut each end of the tail board. No problem. I flip the jig over and line it up to cut the pin board. I cut one end of the pins and take it over to see how the fit is with the tails. Not good. Irregular spacing and sloppy. I go look at the jig, and a couple of the fingers had vibrated slightly apart from one another. I checked the tightness of the screws on the fingers and they seemed to still be tight. I can't feel any slop in the fingers, they don't move or wobble. I'm worried about really crankin down on the finger screws. Has anyone else had this problem? Any suggestions?
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"Vern" wrote in message

Only time I've had one move was when it was slammed because of a climb cut and the router kicked back.
Re-read the sections on direction of cut and retry a test cut. Since that happened I've been very carefull not to exert any more force than necessary when routing/following the fingers ... easy does it.
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Are the fingers set down firmly on the spacer block underneath? If they are not sitting flush on the block on both ends, this might be the problem? I havent had any problems with the fingers vibrating when they are set tight on the horizontal spacer piece.
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Yes the fingers are flush. I think that the response from swingman may offer the most input. I'm thinking about my technique, I may have been pushing on the fingers too much. It's a little intimidating when you're trying this for the first time with the honkin router screaming, trying to keep it flat on the fingers and "gently" moving it between the fingers. I may have been applying too much pressure on the fingers moving between them. I think I need to go slower. MUCH slower, and try it again. I very much appreciate the responses. Vern

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Vern wrote:

No.
Call Leigh.
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