There is a way to extend the old recons by 10 to 20mm, it's a little bush mechanic, but it works. I did it with one of my kids forks, which have recently been passed along to another kid. I'm sure I could work it out again if I had to though.
And if there's leakage between positive and negative, it's probably just an O ring issue. I also think I may have a pile of the correct O rings here too. (I ran out of damper side ones but pretty sure I still have air side ones)
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