Car ramps - under construction

[rendoman]

new update
I tried to shorten the distance between rungs, it really help the climb! I cut the old block and put a 45 degree stabilizer. Seeing now the ramps, If I could go back I would do the flat supports longer. Now I'm thinking to add some 15cm more on the top flat in order to climb easily and being less carefully to stop car in the middle.
The last picture is a joke for an audio group on facebook, it's like an open baffle speaker