We recently got a great deal on a ‘99 10’ foot box StarCraft pup. We would’ve loved to have held out for a pup with a slide out and a pop out, but for our first pup we wanted to keep our cost low because we had to buy a TV to pull a pup also. Loving this experience already, we are considering if we want to upgrade next season to one with maximum interior space for a 10’ (maybe 12’) box. In our shopping/ learning quest at a few dealers, it seemed with most 12’ boxes, you get the wasted space of a toilet/shower (to us since we don’t want or need those.) We are limited to 16.5’ storage length (tongue to bumper), so that means a 12’ box max (or 10’ with storage on front). Any noticeably less tailoring sway w/ slightly longer axle to tongue of 12’ boxes? Is a 12’ box w/o toilet shower combo rare? Ones w/ porta potty only are OK because as we can just remove it and use that space for other storage. Since We’d be shopping for a used in good shape unit, I double we’d run across the rarer High Wall pup, but do their pros outweigh any cons? Generally, how much weight is added for: 1) a slide + a pop out? 2) High Wall + a slide + a pop out?