I believe the AB3s come with push rods already. It was the challenger and Xtreme that used the nylon string.
Either way, use 0.025" or 0.032" rods purchased from your LHS will work. You can use them without a rubber band
on the AE32 but you need it for the Xtemee. The piano wire needed is longer and can bow near the V-tial when
you push down.

JC