Plyo box project!

Today I decided to build myself my first plyo box. First I looked up the how to on crossfit journal; for dimensions and cuts. what I got recycled plywood from my old counter top from remodeling the kitchen, with good size for a 18 inch box and a jig saw. Well, after an hour into removing the old nails, top vinyl glue to the counter, I got it all off. I started to mark and cut the dimension with a jig saw, wish I had a table saw for straighter cut. About an hour later, all the dimensions were cut, but with the jig saw it is almost impossible for me at least to cut it straight and flush and put them all together in the slanted box pattern with slant cut. So after much perplexing that yes i can't angle cut to make the slant box, I decided to cut it square and make a square box instead, and that what i did, all square cut and nail about 50 nails and build a square 18in plyo box.
here is the final box after 4 hours of cutting and nailing..
and testing out the box.