So I went out and bought a HFS humbucker brand new from Thomann for my USA Custom. You can see the product page below, all looks normal, nothing to see that's out of the ordinary. https://www.thomann.de/ie/prs_pickup_hfs_treble.htm I got it yesterday and went to install it last night and it has long mounting legs. I mounted the pickup and it's a hair's width from the strings, so I lower it all the way I can, until the screws let go of the legs and it's still less than 1mm from the strings. I removed the ring and screws, the pickup is standing on its legs in the cavity, still way too high. In short, PRS's pickup that featured in the Custom is for sale after market. It just won't fit a custom as the pickup cavities on a tremolo guitar are too shallow. What a load of shite, honestly, such a disappointment. To add - why in the name of all holy are they making aftermarket pickups with 1/2 inch long legs? There's no benefit to making them with long legs. Short legs will fit anything. Nothing on Thomann's site or on the box stating that this won't fit a guitar with a trem. This was a foolish oversight in my opinion, an easy avoided blunder. Every pickup I ever ordered from BKP, Monty's etc, I always opt for 4 conductor wire and short legs. It's common sense - if you ever want to sell them (I often do) and some guy with a Strat or coil tap is looking - he can actually use it. Common sense, guys, honestly..