We have had customers put the Fly High W719 Jumbo bag in the X 45 rear locker for surfing. You don't have all of the length but you still get more weight than if you added the Xstar rear bag or the Fly high Fat Sac. You will be happy with the result. If you buy from Wakemakers
and you don't like the fit send it back for a refund or exchange. Happy boating.