Take the medium and prepare a hole for the new cut. I always turn the grow cube/rockwool/root cube over and poke my own hole using a toothpick, cuz the original hole is way too friggin big for how I do the cuts.

Next trim down the cuts from the apprx. 6 inches to maybe 3 inches or so, plus or minus, and trim off the nodes necessary to get them to this size. Any bigger and they will not hold up well/stand up in the cube/plug/etc.

OK folks, it is Sushi time, gotta run for a bit but I'll finish later......