Hi Tim
In the DVD I got with the jig/fixture they show how to fix the error with paper (one strip top or bottom on the hookup to the bar on the fixture to shim in or out) BUT it's Not a big deal because it's based off the flat base plate more or less and a little bit of router dust will change it more than paper will..
I don't think adding one (or more) paper strip(s) will change it that much we are working with wood after all

the parts to make the boxes can be off just a little bit and they will do more to change things..than the paper..
The plastic rail works fine for me but you must lift it up and over the rack,in the DVD they say unscrew the knob 2 turns so it can be lifted up and over the gear rack, but I do cheat I just unscrew 1 turn and just slide it over the gear rack and just count the clicks from the rack..
I will say the Lite will do all the same jobs as it's big brother can do but at a lower price..it's a fixture that you will not use all the time I'm sure..
I have added many things to the one I have ,Vac.pickup(front side and back side to the fence),hold bar to the push block,backer board on the push block,etc.etc.
All and all it's a great little fixture that can do many jobs very well..
If I can help pls.just ask ..
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