Hi, well this is probably not the correct area of this forum to post coach mods but since you asked here......I purchased a couple Bosh J strip wiper arm adapters off Amazon (I think you can still purchase them if you check) and I basically used all stainless steel nuts/bolts/flat and lock washers to attach the adapters to the existing J hook portion of the OEM wiper arms. (I used three holes for extra security). This did require drilling corresponding holes into the OEM J hook wiper arm.....but if you take your time and use locking pliers you can easily complete the task. Nice thing is the Bosh J hook allows you to use 30" Michelin truck/car wiper blades from Costco for example instead of trying to find and pay the stupid cost of OEM RV wiper blades which are made to fit the wider OEM J hooks. Also if you decide this is not working for you, just take off the Bosch adapters and you are back to the OEM J hook arms. OEM wiper blades are a little longer but on my ACE this mod works very well. Each season I just check that the stainless hardware is still secure and forget it. Some pictures attached for reference.
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