You're disconnecting those from the bottom, and then letting your endlinks "flap in the breeze" (pun intended). Since that's a balljoint, it does have some swivel type movement, and could potentially slide into the spring and get snapped, or cause some bumpstop damage. JKS discos swing up out of the way on a ZJ so as to prevent damage.
I've heard that the homebrew discos clunk and rattle like mad too. I'm not a big fan of them.
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