John has already changed most of the things I would change: higher opening, stainless bolts, etc.
Things I would like changed/added: A external latch in addition to the internal latches on the back. I would just like the added security.
I would prefer the front of the top be latched down to the jeep the same way a normal Jeep top is. Currently John use bolts through the roll bar, which led to leaking here in Florida (would drip down the bolt right into the jeep). I have sealed it up, but I still like the idea of using the footman's loop instead. Only other item that would be a nice to have is Colorado Camper van makes something called a wee bunk that can be used for gear or kids. If that could be incorporated in that would be awesome
Only Mod I have made is to put Velcro on the panels to keep them from bouncing around and I painted the entire top black. Top gets hot to the touch but I have no complaints about temperature inside from it.
Only thing I would have done different would have been to get a second rotopax carrier on the passenger side instead of the window. Wife would have probably went with the J180 for the room. With the J30 it gets a little tight with 2 adults kid and dog all in there at night.