Have used wedgle for about 9 years now. Never worry about re-filling the bottles. Did 67K last year on about 9K product cost. 13% product cost works for me. Anyway in Michigan,re-filling pesticide containers is a violation. How they would catch you I have no idea, but I try to be compliant.
I have a very large system of wedgle I am looking to sell. I have over 300 of the needles in all sizes, 2 injection systems, 2 high volume kits. Everything is cleaned and in working order. Contact me if you are interested.