Looks good, dont turn up the volume once the subs STOP getting louder. This is how u will damage your subs as they will get a clipped signal. I would use a digital multimeter to set your amps gain. There are plenty tutorials... I think you can check out JL Audios site for a easy one. Now keep in mind when you set them using a testtone. that you should set it with your volume a couple notches below your loudest setting you would use daily as you wont be listening to test tones and music will have a little less bass volume... I hope that was clear u can pm me with questions...
But having a type-r catch on fire and blowing that many subs is def f'd up.... the shop should have been able to figure out the problem quickly