Just for clarification...
The Mapleshade version is not the same as the "modded" S30 that has been discussed here. The "modded" version has a new crossover done by Dennis Murphy. Info on the Mapleshade version is in the link provided above. Some changes are visually apparent in the pics I provided - note the different jumpers on the bi-wire terminals, and the insert into the port making it narrower to re-tune the cabinet.