Another thing: The set screws are hardened. They are probably not stripped, but any allen wrench used in them will probably be. Try new good quality allen wrenches. Tap them in with a hammer. See if the set screws come loose. If the set screws strip out a new allen wrench (my number was 5), try a matric wrnch that may be slightly bigger than an SAE wrench.
Good luck.
__________________
John
Proud Owner of a Model 100 and a Model 124.
A homemade cart, 2 x 42" mower decks, a 38" deck,
a 42" front NF blade, and a lawn sweeper!
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