After carefully putting t-nuts in all eight subwoofer enclosures tonight, which took a few hours, (drilled 64 holes incrementally larger till I hit 1/4, then painted around the holes, then drove in each of the t-nuts with no sub in place, backing out each bolt after the t-nut was tight - - - it occurred to me that some may think there are too big of profit of margins on DIY stuff. (in relation to the recent conversation about a new ID product based on the ultimax driver in this thread) After spending several hours, on multiple days, and not even getting the drivers in there yet...my opinion - no way.
Before tonight, I'd already spent multiple hours; unboxing the cabs, shopping for parts both online and at home depot, putting the feet on the boxes, unboxing and quality checking the eight subs by running 20hz sine waves through them one at a time in free air for a short bit.
I still have stuff the cabs with polyfill, assemble and mount the back plates with ring terminals and spade connectors, cut 10 gauge wire, wire back plates, wire subs, put subs in boxes, bolt subs into box.
So - - - I've still got a lot of time to sink to finish this project - then if you are selling them, you've got to box them back up too and get them shipped out.
All while answering e-mails, questions, sales related and warranty related, having a presence on the forum - etc.
The job of 'making' a subwoofer takes more time and energy than many people think about --- including myself!