3x 10g & 3x 11g rollers (alternating weights in variator) gives you 10.5g roller set.
DANGER: weights must be put in a 120 deg pattern! If not, SEVERE ENGINE DAMAGE WILL RESULT!!!
TIPS: Lighter roller weights will increase RPM for any given road speed.
Heavier weights will lower RPM for any given road speed.
All of this, of course, must be tailored to each person's engine set-up & personal driving style!!