Turning the scenario to jumping brought it all the way up to 1.09 c
EDIT:
now 1.18 c
Obviously glitched, but 1.01 c with 8 nodes, 12 bones and 36 muscles.
All bones and nodes set to lowest possible weight except for the 2 leftmost nodes on the right square, along with the bone in between, which are set to 5x. Every bone connects to every bone on the opposite square via a muscle, which are all set to 3x strength and grouped together.