Decided to replace the battery on my FF 11 as this will be its 4th season soon. I had the screws torqued to 11lbs with a fat wrench. Replaced battery and re torqued to same specs with same wrench. tested at 25 and further yesterday zero was dead on no adjustments needed. I really was surprised as I thought I may need some minor adjustments.
I have heard they hold their zero very well even after removing to replace the battery