I haven’t seen any other templates besides the one you linked. I never use them myself, I just lay them out in whatever pattern is the easiest, based on the sizes of the cable glands. I prefer to stagger them as shown in this photo from the kit’s shop page, since that makes it easier to get your hand around the end part to tighten them. I use a socket to tighten the nuts on the inside of the Pelican case because an adjustable wrench can’t usually get in there to properly grip the plastic nuts.