Quote: (Originally Posted by
colinicky)

There are actually 3 different bases for the KT frame to my knowledge I had the original deep Vision base & now have the new Vision base which is 2 1/2 inchs in height ,does make a difference to the c of g . I have just done a trimix course with 2 ally 7 side mounts with no adverse back problems after 1 hour run times with drills & skills thrown at me as well .
Can you get a suit inflate cylinder in the new vision base? If so it might be worth a try