I few days ago I started to make a cutting board. While cutting the materials for said cutting board I had found that while cross cutting my pieces that they would cut fine and then scrape the back of the blade. Check blade to miter and exactly the same front and back. OK change my reference point for bottom and side against my incra miter gauge. Ok cuts a straight cut. Wait not so fast. Readjust miter gauge, get rid of play in miter slot, resquare the fence to tab and off to the races.
Glue up and have some issues, figure I will do a down and dirty trim of top and bottom sections with tendon jig. This is not working so good, have a ridge that shows up in different points. What is going on? Check the saw over again blade is not stoping at 90 it is like 88 degrees. Adjust the stops for 90 and 45. A bit better. Check the tenon jig and has a bit of play, not tailing much so I thought. I adjust the allen screws on the rail for the miter and off we go.
Moral of this is if one thing is off by a 100th it will only resonate thru out the project.
Making the planters that i posted I never noticed that the saw was off, they came out looking real good. Working with close tolerances showed me how far off the saw was.