Yeah that's what I figured. But my factory playpen bag is only 650lbs and dimensions I don't know but it's longer than the stock 400s by a considerable amount.

I don't think that it will fill up entirely because of width but should be pretty close, I'll have to see this weekend.

I would agree that Fly High should have a sac made that would fit better in a playpen locker but not be as long as the stock bags. You have a 24ssv right? How wide is your playpen?