19mm marine ply? Sheesh, you could make a boat out of that.
I'm only using 19mm form ply because it was all the hardware shop actually had when I had to make something fast last Easter. Stock list said it have three 10mm sheets of marine, but they reckon someone must have lucked out and received marine instead of normal ply.
As to the runners, shrug, locking is more important than anything else. there is no way you want to open the back tray and suddenly have a full or two half drawers in your lap because they just came out as your nose is high for some reason.
Also note that the longer runners do not carry as much weight <head skritch>.
when i rebuild my ute tub drawers, it will be a toss up of sliders or hdpe. There is no way I'm using beesway as lubricant again.
Any idea on what a 2400x1200 HDPE costs?