Hurricane,
If you are still looking at these posts I want to add something to Rushton's post. Using the Walker or AIVS to best advantage requires two cleaning wands on your VPI. The reason for this is that these are multi stage cleaning procedures where the first two stages are cleaning agents, the last stages are rinsing. You don't want to use the same VPI Wand for both so you will need one dedicated for each. I suggest you buy a tower and wand for your VPI so swapping them in and out is a quick and easy procedure.
If you are still looking at these posts I want to add something to Rushton's post. Using the Walker or AIVS to best advantage requires two cleaning wands on your VPI. The reason for this is that these are multi stage cleaning procedures where the first two stages are cleaning agents, the last stages are rinsing. You don't want to use the same VPI Wand for both so you will need one dedicated for each. I suggest you buy a tower and wand for your VPI so swapping them in and out is a quick and easy procedure.