Question regarding the weight shaft

I posted this message this morning and did not see it listed. If this is a dup, I apologize. I have a TAK-128 on a Orion GP-DX mount that needs a 8.2 pound and two 4.2 pound weights to keep it in balance. Would an extension to the weight shaft elminate a 4.2 pound weight and if so, where can one be bought? It seems like a good way to take some weight off the mount, but I never seen anything addressed regarding this. Any thoughts?