I'm trying to think of a simple DIY design with adjustable height AND tilt angle. Has anybody done or seen something like this, using just simple plywood and screws/glue/etc?
Look at the cart photo above. With tilt you don't need lift. My wedge is folded cardboard.
You could make a wedge out of plywood with 4" and 6" options. Depending which side faces floor you'd have it all covered by pushing further under cab. Bonus points for velcro so it collapses.