This is kind of on/off topic.
My rig has 28" wipers. now to buy 28: wipers for an RV is.. Expensive.
Got a Tri-co "Perfect fit" for 10 bucks less change.. IT does not fit as purchased.
Drilled (Well ground the head off) the rivet pivot and enlarged the hole left behind to pass the pivot bolt on my Workhorse and ... It fits perfectly.
I now have to go back for another,,, I'll check to see if they have one already drilled (Seems they used to make 'em that way) but I've not problem dremmeling the rivet if I have to.