I hadn't considered the cost being so similar, so maybe not such a good idea. I'm curious about the planer tweeter in particular having only played with domes in the past. Lots of crazy ideas spinning in my head about MTM designs, but I really think I need something competently designed, with low power tubes in mind, as my own DIY attempts have been meh....damn crossovers. The designs I'm finding are relatively low efficiency and dip below 4ohms. Maybe I should consider active crossovers to sidestep my lack of expertise. Another rabbit hole, LOL