When printing with blocks carved from MDF (medium-density fiberboard), which are economical (cheap) but also typically warped (cheap), a bit of chance is added to the printing mix. One solution would be to put on my big-girl pants and buy some nice wood sold specifically for wood carving, but that can get pricey. So, for a project like this with simple graphic shapes, I wanted to go with an economical (cheap) solution for the blocks.
In this case I carved two blocks, one for each color (opposed to doing a reduction print or making my second block from a print of my first, Peach Farm Studio does a nice job explaining some of these methods.). The blocks were basically the same size, but due to the inconsistencies in the MDF as well as the cutting of the blocks, and the carving, there seemed to be quite a bit left to chance. If I could have closed my eyes when pulling the second color, I would have. To my delight the second color registered really well with the first and I didn’t have to do any adjusting to achieve good registration. I’m guessing this will be the first and only time it works out so nicely.