I've been working on building a shooting board but my edges are a little off from parallel. The distance from fence to the end of the shooting board is 54 cm (540 mm). Across this distance there is a 2 mm difference in width of the shooting board. This means that at least one of the edges of the shooting board is not perfectly square to the fence.
I don't know that in my shop I'd be able to improve upon this accuracy. Writing this post I think I've figured out that the best way I have available in my shop to measure the fence angle directly is to put the shooting board in my vise and use the Beall tilt gauge.
I am thinking that for my initial purpose of truing up the ends of my walnut desk table top that the shooting board is probably acceptable for use.
What I don't know is whether the board is acceptable for use as is for 45 degree miters and bevels (with the appropriate jigs added to the board). The next project I have in mind is yet another attempt at a miter joint jewelry box, with which I'd like to improve on the quality of my miters.
Maybe I'm making much ado about nothing or maybe the board just isn't right yet. Any advice on this issue?