Just bought a crawler for our new pool and the instructions for install don't seem to line up with what we have. We have two suction ports on the side of the pool. There is a manual valve that selects between the skimmer/drain and the two ports. I was hoping to attach the crawler to a suction port, but the manual only describes a situation where there is some sort of regulator stuck in the skimmer while the crawler works from the port. This will not work since the skimmer has no suction when the ports are active. Besides, what's the point of the vac ports if you have to mess up the skimmer anyway? Are all the crawlers intrusive like this? By that I mean, do they have to make it so the skimmer doesn't function anymore, or is the sand shark unique in this respect. I expected the crawler to be able to do its thing without me having to reconfigure the whole pool every time. Thanks for any input.