I have four keepers that I like to improve, one is a over 20 year factory Diana 34s carbine with a firebird stock.

http://imgur.com/6HOFPxS

When I first got this gun it twanged and was not very accurate, it also had some droop and it felt it was not at its best because the TP was not lined up with the barrel bore,
but it still got a lot of use and rough treatment, the barrel got scratched so I just polished it up to the block.

Then I got to like it and decided to sort it out, first I lined up the TP with the bore this also sorted the droop.
I thought that I was pleased with the custom metal guide and piston sleeve, then tinbum sent me a kit and now it's even better.

Its accurate silky smooth and easy to cock and lightweight, what more could I want from a break barrel

Anyone else got a springer that just keeps getting better and that you intend to keep long term ?