According to Jim Katz :
Hi Bob,
I'm afraid that's not a realistic proposition. There is a fair amount
of iron in this well and those passages are probably packed with hard
scale. Considering the amount of time and effort to remove the switch,
it's cheaper to buy even the more expensive commercial model, than to
take it off and replace it again when the first fix fails. If I lived in
a 3rd world country and the nearest replacement was months away, I would
definitely do this. However, as it hasn't failed completely yet, right
now I just need some info on the capability of the standard switch
versus the commercial version.

My well also has a fair amount of iron. It took 10 minutes to pull
the small tube off both nipples, blow/ream it, and put it back on.

No fussing with the pressure switch/internals/contactors required.

Given that it took 20 years, and a well downline removal/reinstall
(because the injector head rusted out) to provoke this, it'll last
another 20 years just fine.
--
Chris Lewis, Una confibula non set est
It's not just anyone who gets a Starship Cruiser class named after them.