I could not afford a pair of these fabuloous speakers and had no room for them anyway, but I could afford to buy a pair of 215 RTF from Supravox and the plywood to build new speakers.
I built the RJ baffle at the time. I helped a friend build an Onken version with a Fostex compression tweeter on top in the late 80s
Both fabulous full sound, courtesy of the perfect phase across the frequency range, the high efficiency and full range of the speakers.
Difficult to beat, specially if driven by a low power valve amp!