Mega Tree Pole Cart

For max strength, I used 10 walls. 0.3MM layer height, 50% infill. Used two 5/16 x 2.5 inch Hex bolts with locking nuts as axles. For more strength a treaded rod could be used.

Designed in OnShape

https://cad.onshape.com/documents/5d8536485ef1af571587a144/w/3e4264cf811673263f6ea05e/e/e793a11eb9dfb822f6bcec00?renderMode=0&uiState=664bbfe79113776d929eb789