No not yet, but I have been using Lucas E85 treatment additive shtuff. No particular reason that I started to use it, I just saw it on the shelf and thought it looked good.
Then somebody posted here that it cleans the injectors as you go.
I had my 120's out of the car after a year on corn. They looked fine and clean and all, but I took them over to Spina and he flowed them for me. They were perfectly fine.
After a couple of months with stock lines I cut open my fuel filter, and everything looked perfect, and in the Spring I'll be dropping my tank. I also added the Lucas stabilizer before winter. I'm not expecting to find anything.