TCL's was an add-on to their complete TB. GW attaches to the existing unit. 

Karl Wolz
Sent from my electronic umbilicus

> On Jun 13, 2014, at 8:10 PM, Alistair Bell <albell@shaw.ca> wrote:
> 
> I think tencentlife had a vacuum switch out before GW did. I thought about buying his but stalling as I don't plan keeping the wbx for too much longer.
> 
> Alistair
> 
> 
> 
>> On Jun 13, 2014, at 7:00 PM, Karl Wolz <wolzphoto@Q.COM> wrote:
>> 
>> Take a gander at GW's vacuum operated switch. Mine works quite well.
>> 
>> Karl Wolz
>> Sent from my electronic umbilicus
>> 
>>> On Jun 13, 2014, at 6:49 PM, Dennis Haynes <d23haynes57@HOTMAIL.COM> wrote:
>>> 
>>> The TB currently on my van has become so worn that it is practically
>>> impossible to set the TB switch and have it work consistently.