Well, I know the horns will get there ok. I'm also concerned that the horns will faithfully reproduce the difficulties the comp driver might be having at 350-400Hz. Besides the expense of a mistake with things crossed that low. If something goes wrong anywhere upstream it could easily cost several hundred dollars in diaphragms. These are different waters compared to $20 K77 diaphragms. But I guess that's the point, right?
The horns might not be perfect down that low, but they'll surely be different than what I'm doing now.