prototype 9

Goal: to test if it's possible to ride over the rolls with the wheelchair in 1 direction and clean in the other direction.
  Now there are beams between the rolls to avoid that the front wheels gets stuck between them.

based on prototype 8

Expected positif:  

tubes rolls in one direction

Unexpected positif:

Expected negatif:   

to width, front wheel gets still stuck between tubes

Unexpected negatif: 

wheels gets stuck up the uphill plate in stead of the tubes.