Maybe it's a phase I have to go through. :-)

From reading I seem to recall that this design is pretty
forgiving and is good with inexpensive drivers. That was my reason
for concentrating on the unusual design. If, indeed, you made the
top less pointy, I'd say it'd be an MLTL.

I am putting a pair of those (MLTL) together-- much smaller
format design -- based on some numbers from GM at Full Range
Driver Forum. These use the FE127e from Fostex. And I can
make them out of 70 cent shelving from the Farm and Fleet.

Before anything, I want to put my line array together
as least a test build.

Thanks for the help. I am not at the stage of doing
from-scratch designs with CAD and spreadsheets. I'm learning
my tools yet. It is pretty slow going.