I took the plunge and installed my Hayward skimmer into my Intex pool today. Went really smooth! I then decided to hook up my automatic Hayward brand vacuum (diver dave). I assumed that the vacuum fitting that sits on the skimmer would be the correct size for the Diver Dave hose....wrong. Still had to use the stupid cone shaped adapter. Anyone know why this is? They are both Hayward products, why don't they use the same sized fitting?