Jelco VTA on the fly


I have received the Jelco VTA adjustment base and installed it.  Went through setup again. Has anyone else installed this?  The adjustment cog sticks on mine, what are your experiences with it, have had any problems. 

Thanks 
Mike 
zardozmike
Note that this is not a Jelco product but a third party accessory.  I have heard from a reliable contact about the sticking and also loud noise through the arm when adjusting on the fly. I have four Jelco arms.
The version I have is advertised on the Jelco site as Jelco model
 BA-1.   I believe it is made by Jelco. 
You are correct. Yes, I've seen it. It looks somewhat cumbersome. your experience crosses it off my list! Let's know if you get it working smoothly.