Upgraded the skimmer to a Red Sea Reefer Skimmer 600. what a story that turned into! I couldn't get the collection cup off and would have to remove the skimmer from the sump, stand on it and use both hands to wriggle the collection cup free.
I named the skimmer "Excalibur" and logged a job with Red Sea. They were very helpful but when nothing worked and i asked for a refund, they asked for a video. Once they watched the video they contacted my LFS and the Australian Red Sea distributor. Next thing i know the State Red Sea rep wanted to pay Excalibur and myself a visit. I think they thought i was exaggerating and at most the problem could be fixed with a replacement collection cup.
So he came over, had a go at removing the collection cup, and instantly offered me a replacement or a refund. I took the refund
I now have a Dalua GW-10 and am very happy. Although i do miss Excalibur....