Thanks Gary for asking me to chime in here. That saddle is a piece of New Tribe history, and so am I. Caveat: Since nylon degrades over time whether it is used or not, seven years is the retirement age for New Tribe saddles unless they show wear/damage before then. That said:
This User Guide will help with old Vi Special, ProGear and Work saddles
http://newtribe.com/documents/BASIC%20SADDLE%20USER%20GUIDE%2010-21-13.pdf
Wear at the waist, not the hip. If you wear the belt too low you will tip backwards. Tie in to the pear screw link.
Only two adjustments: waist cinch strap to make it snug on your torso, and rear butt straps to position the leg straps up or down your thighs where balance and comfort are best.
Is it the right size for you? If it is too large you will tip backwards. Even with a good fit per the measurement chart, some people will always have a balance problem if their upper body is heavy. I hate it when that happens.
Sizing in inches
Waist at navel (not your pants size): 26-32 Small, 33-35 Medium, 36-40 Large
Top of thigh: 18-21 Small, 21-24 Medium, 24-27 Large
Before size tags, we indicated size by color of fabric wrap on belt eyes, and on leg strap bridge
Small-forest green
Medium-olive green
Large-black
Belt and leg strap sizes can be mixed/matched, so check both belt and leg colors.
Good luck, Butch!
--Sophia