as requested, here is the quick and easy process:
step 1. arrange on the floor 24' or 26' long sections (I recommend adding a couple inches to the finished length) of aggregate wood, approx. 3" in width. note: strips look best if you alternate adjacent wood types
step 2. divide the 24' or 26' long section into approx. three 8' lengths. (for 26' long sections, may alternate to two 8' + one 10', or other arrangement deemed acceptable by zach)
step 3. place one 8' length onto the "gluing jig" (aka. the 20' long c-channel + osb screwed to 2x4s). note: be sure to keep aggregate wood pattern in the same order for all three 8' lengths.
step 4. make sure one end flush.
step 5. start gluing. probably best to work in pairs for gluing, since wood glue can set quickly. note: don't be cheap with the glue, more is better.
step 6. once all strips are glued together, place the extra 3" osb strip on top and the extra c-channel against the side. don't skip this step, the osb/channel is needed to distribute evenly and keep boards flush.
step 7. vertically clamp the freshly glued wood aggregate between the two 3" osb strips. alternate with horizonally clamping the freshly glued wood aggregate between the two steel channels.
step 8. finished with one 8' length? move onto the next two.
*enjoy the dumbed down process diagram, not sure why the wood glue looks blue?