That sounds like a good idea Brett, having only used domes in the past I just assumed it was simply a matter of finding the right bits and designing the correct XO. As a guide, I was considering them due to their high eff mainly though being longer (thus putting HF source further back) may help to better time align the final speaker design. It's good that this was split into a new thread both potentially a learning tool which shows what can be done at lower cost and also not to muddy up the original thread. Thanks to all.