Just finished the new syscart and did on a pretty decent budget I thought.
 It just took 2 sheets of MDF, eight pack of wheels from amazon, 10 pack of 24 inch drawer slides (only used seven), some oil based primer and a 5 dollar can of color matched festool gray valspar paint (sampler can). I joined it all up with the domino and used dominos to keep the systainers in the right spot as the tolerances are tight. The only bummer I noticed so far is you have to pick up the MFT to put over the cart as it is slightly too big to just roll in, but fits nicely under the MFT once in position.

That looks great!  I like the double-depth pull-outs!