Unfortunately I got the wrong driver for that single strip build above and it will only put out 1.4A which is less than I was hoping for... Ordered a new HLG-60H-24a which should fix the issue...

A small washer will help a lot if your holes are a little off. You can see what I did here in one of my pictures.

Strips come with holes you can use to screw them onto the sinks, I would recommend this with large strips running higher than nominal currents. You can use thermal tape but personally Id feel more secure with paste and screws myself... Also check out this driver, you could run 2 strips / driver at a...

I have a laser thermometer but usually I just use my thumb to test temp, If I can touch the heatsink near the cob and it doesnt burn me after a few seconds contact, I figure its fine. They can handle a lot more heat than most people realize...

These are rated 700ma nominal, 1400ma max. Id put them on a driver capable of at least 1050 each and you can always dim down if necessary. http://static6.arrow.com/aropdfconversion/a969ce2613e223d76a2eaa5c86343fe6aa185b19/2ds13120bridgelux20eb20series20gen220data20sheet20201710202.pdf Page 6, figure...