AODD with Proportioner

I want to take the next efficiency step.
I want to build or purchase a proportioner, question is, is anyone running one with a 1/2 AODD?
From my reading it’s sounds questionable.

a lot of guys who run roof pumps, run a proportioner or another form of it

On another forum a guy brought up stressing the diaphragm shortening its life with a proportioner, it may be ok for a 1inch, but a half inch, Id like to hear from someone who has done this and has some miles on the unit.

Cost of running business. Shorten life span to save time. Is it worth it? Your call. We do house washing and roof cleaning and using a proportioner means no need for mixing or having to manually adjust the strength of mix. Def worth it in my case. New pump isn’t that expensive in comparison to being able to do more work.

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Good point. Maybe when I get more roof work.