I’m shocked Festool hasn’t developed a line of contractor grade systainers. They’re a company that loves to squeeze every penny they can from you on accessories.
By contractor grade, I’m assuming you feel the Systainers need to be stronger. If that’s the case, and assuming that the same manufacturing process is used, there are only 3 ways to increase their strength. Changing wall thickness, changing the internal support structure or changing the material.
All involve major modifications to the tooling which = $$$$$$$. Injection molds are expensive...as in really, really expensive.
As antss alluded to, changing the material to carbon fibre increases the strength, however it also changes the process which adds additional costs to the manufacturing equation in this ISO world we live in.
From a manufacturing/engineering perspective, it’s important to have a robust roadmap of your destination before you embark on your journey. Because any changes along the way become extremely expensive. I think Tanos has done a great job in this respect.
So...all things considered, I’m quite happy with the Tanos solution. It may not be perfect, however it’s better than the old school Milwaukee metal tool box approach and is certainly 10x better than the new school Milwaukee blow-molding approach.
Blow-molding = a waste of material & a waste of space. 👎👎👎