prototype 11

Goal: to test if it is better with steel rolls in sted of pvc rolls.

based on prototype 10:

Expected positif:  

tubes rolls in one direction

Tubes are strong enough

width is good

Unexpected positif:

the weight of the rolls helps to not move the system on the floor

not to much friction

Expected negatif:   

front wheels gets stuck inside

Unexpected negatif: 

to high