Very nice diy wrench!! I use a funnel on a 4" hose, clamped to the table using the thumbscrew that holds the metal plate in place.
I ended up buying the Lang thread file set from Amazon (initially bought the one made by General Tool, but found that it was made in China when I received it....not a really big made in USA guy, BUT, when the product description is contrary to the actual product, that is just annoying....Amazon refunded the purchase price without requiring me to return the file....probably cost more to ship and restock than it is worth). In any event, the Lang tools arrived the next day and after a bit of work, the sander is about as good as new.
Thanks again.
Mike