All right, I haven't tried out COB's yet.
I have some Strip COB's I wanna test, once my closets are done and I have the space for it.
50 cm x 6mm 12V
They might hold longer, then the hacked strips.
I have lost a bunch of chips on the DIY strips, both on the 700 mA and 1400 mA rig. Most on the 1400 mA rig, but again others are doing fine. I suspect it might be my soldering, that is the cause of the failed chips.
The COB Strips, I don't need to mod or anything. And they where also cheap on Ebay, haven't looked if they are sold in EU or not. I just buy stuff late at night, surfing chinese vendors and buy stuff I think I can use or have fun breaking.