Mr. RL. I can't comment specifically on your planned task but in general, it's usually much easier to work on something "on the bench" as you're probably aware. IF, and it's a BIG if, you can remove the HE without making too much extra work or creating unneeded extra expense (damage to gaskets/hoses etc.) I would take that sucker right off but that's just me.
Just checked your "spot" location and it seems you're in Ft. Myers where you may not have access to your "home bench" so I suppose the best in these circumstances may be to give it a try "in situ" and worry about complications later...