Help with changing SCSI ID#

[Robert Rivkin <rrivkin@umbc.edu>]

Thanks to the many folks who generously shared their
experience with the Apple HiSpeed SCSI card 
ID#7-problem-which-is-probably-the-source 
of my "ghost" partitions on my friend's Rom01, 
I went to change the ID# and, alas, the changer 
didn't [doesn't] respond. :-(

This is a Quantum 105mg Portable-by-Jasmine 3.5" 
external drive, that, with the exception of the faulty 
ID# selector, works perfectly.

The selector is on the bottom of the case, and it 
consists of an inset turquoise square whose round 
center is a "+" configuration of small 
slots for a screwdriver surrounded by the numbers 0-9.

Turning the "+" a notch at a time, then rebooting on 
my RamFAST to verify the ID#, I got the address #7 on 
all but one setting, where I was able to get #0 [the other 
# that won't work on the Apple HS :-(].

I removed the drive from its case, checked for 
tight connections to the selector, replaced the 
drive, and tried again--same results.

Is there any way to repair the selector?  change the ID# to 1-6?  

TIA again,

Bob