The rubber gasket the hinge folds on kinda sets the windshield position. The lock-down knobs
(lower right & left) set the pressure/snugness.
You could put washers there at the knobs but you risk water leakage.
However, I've never seen two measurements the same..?
I put a brace between the top of my windshield frame & the crossbar of the rollbar, just to
give more support & stop any poss. wiggle.
IMHO.., you have a couple choices. You could put a fresh gasket in. You could add some rubber
to the existing gasket. Place shims (least favorite).
--OR--
Just go ahead & mount the the soft top. They fit "tight" & usually have to be pulled down
& set in the warm/hot sun. At some point, if you're not happy with the snugness, it's simple
to losen the supports, unhook the softtop fr. the windshield & make any adjustments.
---Suggestion--
If the hinge works or can be oiled so as to fold the windshield forward enough to
inspect the gasket &/or clean it.., this is a good time to do so. (crud gathers in there)
New gaskets are cheap.
This is all assuming you're NOW speaking about a "full soft top"..., not a 'lil
bikini top over cab area only, as your 1st. post refered to.