Looking good man… I have a box of 50 of these strips I am going to be putting together shortly so I will most likely document it here also… My plan instead of drilling and screwing them to the ally channel, I am going to ‘glue’ them on with high temp silicon filled with 200 mesh aluminium powder and thinned out with naptha to make it more workable. Silicon because it will fix them in place but unlike epoxy they will be removable with a razor blade if required, worth understanding that it’s not the most efficient of thermal compounds but sufficient for the purpose and fucktons easier than drilling and screwing hundreds of screws 
My plan is to run them as pairs in series. so 40v from a 36 v psu via a CC step up converter and 1.5 amp per pair with 12 pairs per light bank.
A bootlace crimp and ferules are the go, it will save you a shitload of stuffing around twisting/soldering wire ends…