I got you. I was able to get that thin strap on the high-pressure tube under a bolt on the Sanden. I doubt it adds much support, that was just to look finished. That bolt should be in the same place on DeliveryValve's compressor, since also a 6-bolt type. I don't notice any compressor vibration at all, relative to the engine. Not sure why an adjustable bracket makes a difference. Once you bolt it tight, the compressor has a solid 3-pt mount to the plate - 2 upper flange bolts and lower slotted brace bolted tight. I use the adjustment bolt just for tensioning, it isn't relied on once bolted down.

I also wonder about the reliability of my factory hoses. The high-pressure one has swollen outer rubber around the ferrule (from oil drips?), and even got a little torn in working it around the bracket. However, I think it has an inner plastic liner that actually holds the pressure (barrier hose). If I ever need to replace it, I might try cutting off the ferrules and recrimping new hose & ferrules. I have an AC crimper and parts, but I don't know what U.S. sizes might work with these Euro fittings. Wheeler Dealers (British) had an episode recently where they needed a hose for a Lamborghini and the hose shop guy was able to match it, but it took a little research. There is a lot of variety even within Europe.