This is the first inside-out Bram/Lowell sphere I've been able to make featuring the standard "jumper piece," the configuration commonly found on your typical SNOT-sphere. It was very tricky to put together, I spent a few hours working on one design, only to be stuck with a "dead end," where I couldn't attach any more pieces. I then opted to build it like the one shown in the picture, but I will show how it is built another time. Due to the difficulty of fitting pieces, it is somewhat flimsy, but holds together. If you want a MUCH more durable inverted sphere, I reccomend trying the red one below, which I posted in the pictures. It has a much more basic core, and no jumpers, but is very strong (you could throw it on the ground and it wouldn't budge). It's design is the same as the Studs-Down Squares I made, with a tutorial being shown here. It is pretty much a 4x4x4 studs-down cube, but then you add the extra sphere bulk to each side. Try it for yourself!