“But we all get older.” I don’t know where you get that nonsense LOL! I’m fighting it every day – but I don’t see me winning – unless I die first LOL.
To answer your question: either buy new limbs for your bow (60# limbs – will give you range of 50-60#) or buy a new bow with 60# limbs.
I called Mathews a couple of weeks back and asked the same question about my Helim. They don’t advise drawing below 10# of max weight of the limbs on any bow.
I’m sure you can squeak a couple of #’s less but IMO, it’s not worth it.
I bought my Helm at 60# and then had shoulder surgery (3 actually – left side and twice on right since Dec 2012). As of a couple of weeks ago I still couldn’t draw with it set at 50#. A dealer said I could safely take it down to 48# but I decided to call Mathews anyway.
The guy with the Z7 would have to be using a 50# max limb to turn it down that low IMO. Not that much threading on those bolts I would think.
IMO – if you like yourself and your bow – don’t chance it.
You can turn it 10 pounds down from maximum poundage. I’m sure you could play with how many twists you have in your string and cable and get an even lower poundage. That would result in you voiding your warranty, and possibly hurting yourself. If you love your bow and plan on keeping it for a while a 50-60 pound set of limbs would be cheapest and you would get warranty with the new limbs. Another thing to think about is you might be able to sell your bow and purchase a newer used one with the poundage you want within the price difference of the new limbs. A monster series bow in 50 pounds would give you about the same performance as your drenaline does at 60 pounds and would be way easier to draw.