My take. All shafts 12.5 - 12.75
Maple deflecting the most.
XLR8 right under maple.
OB1
Revo - Cynergy - Prime M
BD SS360/2
Barioni deflecting the cue ball the least
I noticed to get the balls totally clean you must do 2 cleanings. After the 1st run the balls must be turned 90 degrees and cleaned again as the balls do not change orientation during the process.