Trimming arm added to wheel table

[CMCook]

Has anyone seen a metal arm that was attached to the potters wheel table that was bent at a right angle and attached to a clamping device so that the arm could be raised or lowered and swung over the pot being trimed so that you could use the arm as a support to place your hands on during the trimming procrdure. Thanks and I really enjoy reading all the posts on the site. Never a day goes by that I don't learn something.