Had the same problem. What I did was to take any excess out of the cable and housing. The cable isn't trying to straighten out the housing or other words the cable isn't fighting the housing.
I used an MGB dual wiper system and had a two speed. Cost is is low and you wind up one or two wipers that make a strong contact on the glass. 12 volt only.
Use common sense. How much weight do you want hanging out there. It takes very little weight to flip that block. Just because he jumped off the bridge and survived doesn't you'll make it.
It's nothing different than going into one of your local parts stores. No great experience in the business. Everyone relies on the computer, which means, hire anybody. Granted there are some highly experience counter people but they are few and far between.
Are we using JDCH for the right application? This grease is not a universal product. It was designed for farm equipment. I'm only asking the question and not condemning.