I'm not sure what you have there, Kent. One of the Spacedecks that I had, I sold locally, WITHOUT an arm (my son has the other). I sold the Spacearm separately, so I doubt that you have the same table AND arm. At any rate, I used a XX-2 (8.0 gr) on the arm that I had AND a 17d2 (5.3 gr) and was able to set VTF just fine. I am at a loss as to your issue.
If you decide to order a heavier cylinder (it is bronze actually, my mistake), call Nottingham directly and tell them your issue. IF they agree that it needs to be replaced, which I doubt, ask them if you can buy from them directly. When they say you have to go through ASL, tell them you will do so but would like for them to notify ASL that you will be calling them and ask whom you should speak with at ASL. Then, call THAT person at ASL and tell them you talked to Nottingham directly. YOu will get better service that way.
If you decide to order a heavier cylinder (it is bronze actually, my mistake), call Nottingham directly and tell them your issue. IF they agree that it needs to be replaced, which I doubt, ask them if you can buy from them directly. When they say you have to go through ASL, tell them you will do so but would like for them to notify ASL that you will be calling them and ask whom you should speak with at ASL. Then, call THAT person at ASL and tell them you talked to Nottingham directly. YOu will get better service that way.