Hi Gerry,
I'm a fan of DBS having had it for over 13 yrs.
I found it upsetting both before and after the procedure what I perceived as negativity towards what could be and was a good outcome so please hear me out.
I saw on your posting you take Rytary 3 or 4 x Daily.
Is that the only anti parkinson med you're on?
It doesn't seem much when stretched to a 24 hr period and my thoughts are if that is your current drug regime then see a movement disorder Dr and see what he/she comes up with and go from there for maybe a yr or 2 or 3 before considering DBS.
Either way good luck and best wishes.