Yes, Tempesta looks like good possibility and I am intrigued with learning how to build a curved cabinet. Apparently his efficiency ratings are more conservative than most commercial products, but I built M125's with idea that they should power just about any speaker out there. Rick at Selah has been quick with reply to my emails and he also seems to do lots of customized iterations of his designs
In meantime I'm back in Troels website and now considering his 3 way classic lineup (this one has super spendy AT drivers but similar price point to the Tempesta kit):
Does not hurt that Euro is about 1.1x USD right now.
So basically I'm all over the map, but that's part of the fun. Started out thinking floor standers but now 3 way monitor seems like much better WAF, plus half the mass and surface area for lifting and finishing during construction.
Like all DIY, at some point one throws the money down then spends dozens of hours building with no chance to audition. Pay ahead of time and hope it sounds great?? (or perhaps be so emotionally invested that one imagines it sounds great???)
Bluemeanies- is your upside down anti gravity M125 avatar gone now? I always liked the idea of a 45 lb floating tube amp.....