New waveguided tweeter from SB Acoustics

I bought me some SB26ADCs.

I've never had much luck putting one inch tweeters on big waveguides, bug after my phase plug experiments went well I thought I'd try and give it another go.
For the money (and at almost any price point) they're quite clean and have really good extension to the low 1000's as long as the SPL requirement isn't very high (4th order crossover of course).