Today I was looking at an old Topeak (I think) rack & was surprised how much wider it was than the Logo, 2-3".

For carrying heavy/bulky stuff on a narrower rack I suppose one could use stong cord & tie things tighter & more extensively however I guess there has to be some limit. I've thought about experimenting with a case of beer, heh.

Also, what about rigging up some sort of platform & bolting it on top of rack? Maybe 2-3 1" strips of billet aluminum mounted cross-wise with holes drilled at the ends for tie-down? Something like that might even help with wider racks. Anyway it seems backwards to make narrow touring racks unless they're specifically designed for credit-card light touring.