I put these LMAHL V2 tweeters on top of my vintage La Scalas, and they completely outclassed my mid and bass horns. I surrender. I cannot build a better La Scala; I need to just buy the AL5/6.
For the Eliptrac 400 horns, I decided not to reconstruct my vintage La Scalas to accomodate them. I also have the plastic 1.5 inch adapters if you'd like them. Again, the only solution is the AL5/6.
All four pieces are $300, or you can take one pair for $150, two tweeters or two horns.
Shipping costs are very extreme, so only local sales for these.