Hey Don - That's a simple solution to something that many make complex. I use a digital luggage scale along with a plastic grocery bag and various canned goods. Tuna cans are good for fractions of a pound. And to lighten your trigger on the A-22 try taking the action apart and polishing all the contact surfaces with 800g (or finer) wet/dry paper. If you carefully and lightly polish the trigger and sear surfaces this will smooth the trigger significantly. I don't have an A-22 so I don't know all the possibilities - maybe someone on here with an A-22 will give you some better tips.
I looked on Youtube and didn't see any detailed vids on 'improvements' but you may have better luck. or maybe some other forums?
I have just a 64, but I did several mods like that to lighten the pull. MCarbo makes a spring kit and I went further by replacing the trigger return spring with an even lighter one than MCarbo's.
Best luck,
Ed
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