Hi Scorpion,
I have 2 ongoing projects, the 2nd one is the MTM plus woofer, I have not had much progress on this project. If you are refering to the tweeter yes, I use B&C DE10 compr driver and ME10 horn. This combo need some equalization.
Another alternative you may like to try is DE10 and JBL horn ie PT-F95HF, $10 each, this combo you also need equalization, the x-over freq is around 2.5Khz not less than 2Khz, this is the limitation of DE10 not the horn. If you have more money try De250 it is very good.
Sorry it is very late here I going to bed. If you need more info leave a message here, catch up with you tomorrow.
Cheers.