Floppy drive head wear

[Alex Eisenhut]

I'm daydreaming about floppy drives and how the r/w head works.
What I'm pondering now is why some drives like the Commodore SFD-1001 who push the limits of disk capacity (1M on a DSDD disk) have trouble in the inner tracks.
I'm guessing that because on the inner tracks the flux transitions are packed closer together, if the r/w head gap is somehow the wrong size the waveform gets muddy, due to HF loss.
I have yet to find an actual mechanical drawing of a 5.25" drive head. So I'm just guessing that the gap profile is like a tape head, there is a beveling down that widens the gap when the head starts wearing down.
Like a open-reel tape deck that loses HF response on the lower tape speeds when the heads wear.
Make sense?