I made blocks from a 2 x 2 with a 1/4” holed drilled through one face and a 1/2” drilled through the adjacent face. With the two different size holes the blocks can be used for either size shaft.
To make them I just drilled a series of holes spaced 1 5/8” apart in a length of 2 x 2 first using a 1/4” bit. Then I rotated the stock face 90º and repeated using a 1/2” bit. The length of drilled 2 x 2 was then cut into 1 1/2” blocks. The extra 1/8” on the hole spacing allowed for the saw kerf when trimming the blocks to size.
The blocks are easy to store in any number of configurations.
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