Finished this guy up tonight (TB550A). Not the easiest of builds, as mentioned patience is key. I made a couple careless mistakes along the way, but all are resolved. TIP – Triple check alignment/orientations at all stages. For the time being I’ve loaded it up with a pair of 990’s & a CMOQ-2S. I might swap out the 990’s at some point, but I have to say it’s performing very well as is. Great EQ kit.