I installed the kit on my 60 gallon compressor and had the unfortunate incident of having the plastic line from the tank to the cutoff switch *MELT* and blow off. Too much of an angle and the hose wasn't up to the task. Thankfully it's simple 1/4" ID plastic line with release fittings on each end so I was able to plumb in a replacement piece- only to have it melt again. Okay! I get the point! I replaced the plastic line again, this time with 1/4" copper tubing from the tank to the T joint where the HF unit plumbs into. To cool off the air, I coiled the copper tubing about four or five turns in 4" loops before it got to the T. It may look silly, but the tubing is enough to burn your fingers at the start, but cool to the touch at the end, so I consider that a win in my book.
As for the age old HF bashing- leave it be. Use what works for you. For *MY* purposes, I have multiple $10 right angle grinders that have cutoff wheels, flap disks, etc, all on the welding cart. I also have a very nice $100 Craftsman that is by all means superior in build, quality, reliability, etc, that I use for grinding. It's also a PITA to keep changing from grinding wheel to cutoff, to flapdisk, etc. Having multiple of the smaller ones makes my work go by faster when I can grab the lighter duty tool for that quick job and keep the heavy unit for the big work. Again, use what works for you. For me, quick change with multiple was a better choice.