Aspys and E7 print vertically. That changes the grid compared with G0, G1 and Mirai, even though the family logic is related.
The difficult area is the collar. Printed vertically, that thin upper rim would move left and right during the print if each shoe stood alone. A moving collar prints less precisely and would normally ask for support.
River solves that by printing the two shoes facing each other, mirrored and attached at the collar. The two collars become support for each other, so the printer has a steadier structure in the exact zone that would otherwise wobble.
After printing, the fused collar connection is cut with scissors. The point is not decoration; it is a practical print trick that keeps the vertical collar area cleaner without adding ordinary support material.
E7 follows the same idea as the thin-soled version of Aspys. Aspys is the barefoot vertical version; E7 keeps that vertical paired print logic and adds a fine sole underneath.
The Aspys video shows the result clearly: the pair comes off as one printed unit, then the joined collar area is separated after the print.
Aspys
A barefoot River shoe with the same grid family as G0, G1 and Mirai, printed vertically. The two shoes print as a mirrored pair fused at the collar, then are separated with scissors after printing.
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E7
The thin-soled version of Aspys. Like Aspys, E7 prints vertically as a mirrored pair fused at the collar, then the two shoes are separated with scissors after printing.
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