I have a simple formula for choosing stabilisers.
1) must be well made and strong.
2) all the metal parts must be made from the same metal so no mixing between stainless steel and aluminium
3) must balance on the finger 2 ways 1 on the pivot point in front of the riser and upside down 1" in front of the long rod bushing.
Thats it and it works for me and is easy to reproduce that balance.