Check out the whole alacarte series of minideep dives. Go to the channel, look for the tool trailer playlist or CLICK HERE and look for your video of interest:    • my PaulkSMART tool trailer video col...   And now TOOL CUBBIES: These cabinets are based on Ron’s plans for the SMART trailer but is modified for my shorter 10ft trailer from his 12ft trailer.
I have recently posted a MAKING THE TOOL CUBBY ROUTER JIG video that goes into detail making the jig to easily and quickly route all the quarter inch slots for dividers (every 2in on center). The link is here:    • Tool Cubby ROUTER JIG  making the Ro...  

TC1 DIMENSIONS: are 87in long by 14in tall by 14in deep. TC3 dimensions are 67 1/2in long by 16in tall by 20in deep. Each cubby is built as a separate cabinet with 3/4in ply top, bottom, sides, and 3/4in ply spreaders for the back. 1/4in slots are routed and are routed every 2in. The dividers are rearrangeable and are of 1/4in plywood slightly smaller than the height of the cabinets so they are easily removed once the front ¾”x ¾” plywood passive restraint stop is removed. Routed slots route 3/8” deep using a ¼in spiral upcut bit in my cordless DeWalt router. I built a template jig for the slot routing.

Talk about convenient! I have rearranged these cabinets a few times as my tool inventory changes. It is beyond easy to make this work for my tools. In my next, larger trailer, I plan on having all three banks, TC1, TC2, and TC3 because they are that handy. They can even be made out of laminated dimensional lumber for longer than 8ft lengths too. If you build these, I recommend you make more 1/4in ply dividers than you need just in case you decide on many narrow tool spots. Running out is a hassle to set back up for one or two cuts.