I agree with Rich the bars are nice but really easy to have a fault. On our press we already had to bar switches have the little tiny allen set screw come loose and render the bar useless. So now we make it a point to occasionally check the set screws for tightness and add a little lock tite to them.
my stepdad was a machinist (ww2 vet, navy yard machinist 30 years after that) and told me that if i had a set screw that was coming loose, put a flat set screw on top of it. once its tightened the set screw shouldnt come loose. avoids the use of a locktite that can settle into the allen socket which might prevent use of an allen wrench.
do not use a conical set screw on top - it will damage the allen socket for the wrench.
this was the way he did it years ago, im not a machinist - maybe things have changed?