I've got a few q's
Presently and continuing, your supervisor has been supportive of you?
Would they be willing to listen to any constructive suggestions?
If yes
Tell them re your present physical situation ie pain.
And to suggest an ergonomic assessment for you and the others
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What I'm reading from you is that the work is requiring you to
move.................... Not naturally therefore your shoulder goes out
etc
The cost should not be absorbitant
And would /should make the wkplace even more productive WITH LESS strain
on you.