The Promar RN-628 works as far as fitting the Kelly's Island hoop. I had to drill out one roll pin to install the new bag. I went the extra step to tap the hole and add a 1/4"-20x3/4" bolt in case I want to change the bag down the road. On the negative side the hoop went from 2lbs to 4lbs. I'll have to see how it handles later this week.

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