If it hasn't yet been pointed out a line array midbass with a point source tweeter isn't that good of an idea, as you have different radiating characteristics from the two sourcesHi Bill.
After wading through many DIY projects on diyaudio and the like(
http://www.lalena.com/audio/calculator/xover/
http://www.geocities.com/dmitrynizh/labaffles.htm
http://yu-ra.tripod.com/array.htm
http://home.new.rr.com/zaph/audio/audio-speaker11.html
http://www.tolvan.com/edge/ )
,a simple FAQ for people would be a pretty cool idea-as a sticky post on the forum perhaps??? Im sure some one could organise it here easily..this would save alot of posts -leaving time for the serious technical Qs to be answered.
if i could get some of those 67c drivers shipped to NZ id give a line array a go :-)
Cheers!
(Idealistic) Mike