Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4661782.

Trefoil cube scaled at 7in with 1in bars, scales as desired (assembled has a triangle box at the bottom to help lay it flat on slice softwares)

for parts, print 3 sets (6x 4.5 unit tall, 3x 2.5 units tall, 3x 6.5 units tall)