Well, ... I contacted the Sammi seller and those can be had for a bit less like $3.50 each. Tempting. The frames look difficlt to mount / seal with only a 1 mm of edge Ideally I would like to build another simple tower box design but with the option of using a passive crossover with an lpad to balance the respective lines. I want it all. Seriously I'm giving the current set-up one more workout before it goes in the garbage. I'm wondering if the use of a known driver like the B3s or n would allow me the possibility of using a variation of CC's Scrappy crosovers.