Hi, just want to chime in....my brother and I have been H/K fans since 1977, ever since my old warehouse manager turned me on to them. It was a 402A intergraded amp. My brother still has his. I have the trilogy set-up, 16A, 17 pre and a 18 tuner. The amp and pre were completely gone through by a gentleman named Patrick K. from, I believe Grand Rapids, Michigan. I have pics of the 17 being worked on but not the others. And yes heat sink paste redone as well. On paper they are great but listening to them is absolutely the cat's meow BTW I upgraded the tuner myself with a kit I purchased. I"ve owned other high end equipment, VTL amps, Meadowlark Hot Rod Herons, etc. I don't know if Patrick is still living as he had much health issues. I'm running Focal speakers now and this set-up is nothing less than awesome. Thanks for reading.