Here you see the finished construction of the pedals.  You can see the 2 sets of drawer slides that I used.  These were probably the most expensive parts.

I totally over engineered the pedals for strength.  I used large slides then used heavy metal brackets to make it stiff.  I wanted to make it as strong as the real pedals with a similar feel.  I still need to load another spring across to increase resistance.

The white base is just a pressboard shelf that was shortened so that the pedals didnt stick out from the wall so far.