Looks good Iceman!!
I notice you used the 3" screws. I ended up not using those and just used the 2 inchers, but I also countersunk the hole in my HDPE board to allow me to do that.
The guys on the MC forums using this plastic handle on demand have noticed cracking around the bolts attaching the shelving brackets. For this reason, I ordered the all aluminum handle as others have done, and will have version 2.0 here soon.
I see you don't have a hole cut for the lever on the forward suction cup. Did you just cut the big part of the handle off?