Kevin,

Here's the link to your photo album at PoolForum. Given the questions you're asking, you might want to take some pictures of the pool and span, as well as the QuicClean controller AND an overall shot of the equipment, and let me add them to the album.

The benefit -- in a situation like yours -- of a VFD pump is that it can be 'tuned' to your pool, without having to 'design and select' it to fit. With a 2-speed, the situation is reversed: to be sure it will work well, it DOES have to be 'designed (selected)' to fit. And there are too many loose ends, with your plumbing, for me to even try.

I also don't understand why you'd remove some, but not all cleaning heads. Does your controller rotate from head to head? Or, are there groups of them clustered? If you remove a head from a group, I believe that it's likely that that group will no longer clean.