Back in 2011 Jacksonville Open, my dg buddy of mine was joking with Paul McBeast about he wished to borrow Paul's arm so he can throw far like him. Paul simply replied in clear fingerspelling "TIMING".
So overlapping shoulder, elbow, wrist, pivot (plus hip, foot work?) arcs at peak would represent the optimal timing. The better timing, the smaller circle. ceteris paribus.
In PF MJ Contender bag on Bag Boy Quad: Anode Zone Fuse Tangent Axis Vector Amp Volt Shock Villain D4
"You just can't have a doubt in your head." - The Hammer