I certainly don't have the knowledge and experience of BarneyBean and I learned a lot from his earlier posts---my 2 cents: I found that this design added a little too much extra weight to my dish and strained my motor. I have a 1.2 m CM dish on an HH motor so needed to get rid of as much weight as possible.
BTW, in reading this post, it really makes me appreciate all the senior members of this group--how everyone is so great at lending a hand to others.