Even as a semi-pro (yes I build and sell part time and do turn a profit) I can tell you measuring twice is not always enough. I've wasted a good amount of material in R&D even with a CAD system. My suggestion is to draw one out on paper first. Examine what your needs are then see if your sketch matches that. If not, do it again. I made a tub rack for a customer that has different size tubs in it. A 16qt Sterilite is about as long as a 28qt is wide. It's a good mix.
Once you decide on your configuration, buy a couple of tubs so you can get exact measurements. A lidless style rack needs to be much more precise than a system that uses the lids of the tubs to secure the snake. An extra 1/16 of an inch may be all that a snake needs to squeeze out in my opinion.
When you are confident in your design go buy materials and build away. I'll be happy to answer questions along the way when and if they pop up. Well, most of them anyway. :D
Most importantly, have fun on the build. :gj:
Dave
