@tomic601, Tom and I really hit it off. I would always gravitate to his workbench when I went into Brooks Berdan, Ltd., where I would watch him find the problem in (often) Jadis amps. He is one of only two guys I would let near a Music Reference amp (the other being clio09). Both of mine (RM-10 Mk.2 & RM-200 MK.2) are unmolested, factory stock. The mods guys would perform on his amps drove Modjeski mad!
About Keltner and Tutt’s drums: in the 70’s (when the Sheffield albums were made) Keltner was playing double-headed (heads on both top and bottom of each drum) Pearl drums, Tutt single-headed (top/batter head only) Ludwigs. So their drum sound could not have been more different. Plus, they used different size sticks, and had different "touches".
Keltner came to Rock/Pop from Jazz, having been born in Tulsa and moving to Pasadena at a young age. His favorite drummer (one of mine too) is Roger Hawkins (The Swampers---the Muscle Shoals studio band, Traffic). To hear the father of Rock ’n’ Roll drumming, listen to Earl Palmer (Little Richard, The Wrecking Crew). I, along with lots of other drummers, used to go see him play live at Chadney’s Steak House in Burbank (which closed in the late-90’s), across the street from the NBC studio where The Tonight Show is taped.