5. Selecting the bins. The next problem was to select the sizes of Quantum tip-out bins. I knew I had eight 2' by 6' racks on which to afix the bins units, but how many of each to buy...I measured the approximate volume each of my hundreds of containers, calculating about how many large bins I would need for voluminous items versus smaller bins for rarer parts. The useful sizes are seen below. I finally designed two storage systems containing 419 separate tip-out bins. The QTB 302 was too heavy filled to be used on the Slider Frame. There was a limit to the sizes of bin units on the back and the middle slider, due to the depth of the whole system and particularly the sliders, but the people at Quantum helped with that.

