SuperDrive HD-notch detection

[spector@vax2.concordia.ca (Mitchell Spector)]

	I recently added a SuperDrive and Apple II 3.5 Controller to my
IIgs (only US$100 for both! :) and went about testing it this afternoon.
At first it wouldn't work at all, but considering the amount of dust inside
the floppy mechanism, I figured the heads were a bit clogged, since it now
seems to work fine after a bit of use. However I noticed something which
I'm not sure is normal...

	Quite a few of my Double-Density disks were unreadable by the
SuperDrive, both a mix of ProDOS 800K and MS-DOS 720K. I thought this
was strange, since it's the original model Sony mechanism (extracted 
from a Macintosh SE/30) that has no problems with GCR and DD disks. 
Later I noticed all these disks had something in common -- a square 
imprint on both sides where the High-Density detection hole is normally 
cut in the plastic. There is _not_ a hole here, just a small imprint in 
the plastic. I took a piece of masking tape and covered the imprint, then 
all those disks read fine! So it would seem the SuperDrive is being super
sensitive about the detection hole, when in fact there is _none_! Is this
at all normal? And if not, is there some way I can realign something on
the mechanism so it's less sensitive?

Note: I'm using an offical Apple-brand SuperDrive controller, and the
      SuperDrive is one extracted from a Macintosh SE/30, which was then
      implanted in an Apple 3.5 (800K) external case. This is on a ROM 3
      Apple IIgs.

Mitchell Spector
spector@vax2.concordia.ca