Ok took me a few months but finally finished my DIY subs.
A quick little recap: Sold my 2 Epik Conquests and decided on going the DIY route. The subs consist of TC Sounds LMS Ulta drivers shoved in (super beefy) 4cubic ft cabinets built by Elemental Designs. The subs are powered by an LG FP14000k clone amp.
Here some pics of the finished product: