Loki,
I had the Dolphin Premier and I doubt it will do what you want..
Does it look like this...?
View attachment 647163
If so, it has two small suction slots and very small filters... It is a 10 or 15 year old design...
I've moved on to the EVO, but I am not sure it would work for what you have.. Seems like the cones would just get jammed up in the suction ports...
About a month ago I needed a new robot pool cleaner and I contacted Margaret at Marina Pool and Spa. My initial goal was to buy another S200 "style" robot as I have been happy with them so far. Margaret suggested that I might want to look at a new line of robot cleaners that Marina is now...
www.google.com
Not sure it is even possible, but I would try to find someone local that will let you try out their robot for a couple of days.. Some Pool Stores have loaners.. Unfortunately, the only way to know for sure if a robot will work, or not, is to actually try it...
Thanks,
Jim R.