LTD02, there is a design for that called the Daniel. Cuzed2 is building a variant of it to get 8ohms down below 200hz or so at the expense of size and 2 more drivers.
To all, most of the SEOS designs are over on diysoundgroup. If they were all posted here it would be kind of pushy towards all the sub builds and other types of speaker builds. So if you're hunting for a specific design go to www.diysoundgroup.com/forum/
because even there are quite a few more than just the kits listed for sale on the site. Like the Daniel, my in wall delta max, I have an eminence alpha8a SEOS build that $150 including the entire enclosure or $120 with just the baffle, MTG-90 has the 2226 design there, and he has an 18sounds build I think. Plus some smaller things. You don't have to be a member to see them, so worth surfing around to see what there is.