Which cover lifter works for the circular 320?

Slide 'n Store Extreme 9901196 - compatible with all Beachcomber hot tub covers
Airlift 9901207 - compatible with most Beachcomber hot tub covers including 007 with modification, excluding 320/ 321
Lift 'n Store 99AA002 - compatible with most Beachcomber hot tub covers including 007 with modification, excluding 320/ 321
Lift 'n Store Plus 9901180 - compatible with most Beachcomber hot tub covers, excluding 320/ 321
Slide 'n Store Plus 9901178 - compatible with most Beachcomber hot tub covers, excluding 320/321