Heavy Duty Modular Filament Storage System

I have limited space and limited mobility, therefore I need to stack my filament in a way I’m able to pull a color out without having to unload a large stack.  I was using another stacking system but found the bottom units would not hold the weight going up 15 units.  I came up this this system that allows you make you’re a high and wide as you like and using only 170g these have held up well.

Plan your shelf system well because you must use the interlocking pins to secure each shelf and they are not easily separated.  Plan, Plan,Plan!!!

Hopefully this will help someone as they have done for me.