I have a custom Orca skimmer. It's a bigger model--8" diameter, 30" height--but I love it. It was just a blank so I drilled it, installed uniseals, mesh modded an OR3500, and tuned it up. Skims like a champ but I wish the neck were wider--it can't handle the air that the pump is pulling (14-15lpm). I've been trying to contact them but they don't respond to the email form and don't list their number... Do you have a number or email I can reach them at that you could PM to me? Thanks! I know you'll love the skimmer.