Recently picked up my 21 footer. Nice rig! Had it out 5 times this summer already. Its much heavier (6895) than what I saw at the shows (5895) and online although I added a bunch of upgrades. Just took it to storage and they let me know my 21 footer actually has a 24 foot box and is 27 feet long overall. I was thinking it looked long. Is this correct? 21 foot is actually 24 ft?