Rosami - Good question about who installs what how and where. At this point the situation is more like a stew simmering on the stove than a clearly delineated plan. It is probable that we will develop a bag of tricks, some of which can be implemented by the user, or perhaps regionally certified technicians. As upgrades become higher in complexity, cost and expectation, it is probable that process testing will become relevant, such as right-left matching or actual driver performance to tweak xo values. So, there will probably be various solutions, and probability that consultation will be part of the mix to determine an upgrade strategy for your particular vision.
Regarding cabinet bracing: Thiel cabinets are very rigid, but there are always weak spots in any outcome. I will address those weak spots and devise fixes which must be retrofittable, because we'll be working through driver openings, and possibly be removing a bottom. My emerging method of promise is to use wooden sticks to join adjacent panels in critical places. Since Thiel panels are braced with MDF cross shelves, the Modulus of Elasticity, deformation characteristics, damping, etc. is simple. Dissimilar materials introduce desired complexity. Long-grain solid spruce possesses relevant engineering properties about 10x greater than MDF. Adjacent panel connection introduces differing geometric forces (from shelves) which serves to mechanically damp resonances without introducing mass, as viscous damping strategies do.
All this is to say that I have been working on this cabinet problem, since the cabinets were my work to begin with. Among the tools I have applied is a digital stethoscope which allows me to listen to the cabinet with my ears simultaneously to exporting data for real-time visual (SpectraFoo) analysis along with storage for further FFT based processing.
This Thiel project is encouraging me to develop such methods which will also apply to my musical instrument development work. I love synergy.
