The threads should be standard on most tripods - mine were 1/4"
Also, now that the glue is dry the PVC is very stable. FYI, I just made one adaptor and screw in different "saddles" (they all have 1/2" threads) onto the modded plug.
the 1" saddle with padding fits my Aries
the 3/4" saddle with padding fits my glowtorch
the 1/2" saddle with padding fits my Leadlights