Another box making technique:

 

If you are making a box with a lid, the best way to do this is to make a six-sided box (cube) and saw the top off.   This results in two things:

1. grain match between lid and base
2. guaranteed alignment, even is the box is slightly out of square and dimensions are the same

 

The problem is when you cut your box off on a table saw, the last cut is prone to pinching as the other three cuts close up a bit.

 

Solution:  

When gluing up the box temporarily glue up a piece of scrap or two on the inside surface. spanning the cut line.  Hot glue or double-sided carpet tape work, as will hot hide glue.    When you cut the sides, set the depth of cut to cut through the sides, but not all the way through the scrap.   This will hold the lid in position while you make all four cuts.

 

Once done, take a small hand saw and saw off the remaining depth of scrap, open the box and remove the scrap pieces.

Cool Tip!!! Thanks!

 

Sure beats sawing "almost through" and then cutting with a knife.

Another great tip...Thanks!

thanks Keith...;