Hi, Paul,
Matt actually went from B-24's at the 492 BG (North Pickenham) to B-17's at Eye.
I heard back from him, and he and his crew were assigned to only one B-17 at Eye, the Old Doc Stork. (Based on other answers here, it looks like the general rule was one plane per ground crew. I did read in one of Freeman's books—and another reference somwhere—that this changed at some point, but Matt was there for the duration and had only one assigned plane at each group.)
I'm attaching a picture of Matt and at least some of his crew standing in front of their shack at North Pickenham. I've got pictures of him with Old Doc Stork, as well as a tent they lived in at Eye. If that turns out to be the equivalent of the shack, I'll post it, too. (There's also a picture of all the ground crews standing in front of a B-17 at Eye. I can post it, too, if there is any interest.)
I hope we'll hear from some other crew chiefs. I know another fellow who lives near Boston (492nd and 467th), but I'll have to snail mail him. Matt, on the other hand, is 89, e-mails and scans all his pictures, even setting them up as a slide show. I've asked him some of your other questions, and will post when I hear back.
Reed