I'm almost ready to install your board design, @360alaska.
While I'm not the most experienced electronics hacker, I am willing to do whatever it takes to get it installed. I know - inept but persistent. The worst kind, right?
Without asking you to hold my hand with each step, I have a few questions if I want to start putting this in. Putting pictures as links so they don't clutter my post.
1 - You've posted some great photos, between which the red wire seems to change places. Could you tell me where from and where to it goes in each case, or whichever spot worked best for you? Am I right to assume this is a ground wire?
Red wire 1 vs Red wire 2
2 - You mention connecting a diode. Is that an existing one where the ground goes, or is that something I need to add? If so, I notice my Mac has an unused one sitting half connected at R8, the DIMM bytesize switch. Could I use that?
My R8 diode
3 - The header bits I got in look the same as yours, except they're coupled together a little tighter so they don't line up with the pinholes in your board:
Narrow header pin strip
I know these arent the right angle ones, those are coming in this week from the same vendor. Did I buy the wrong header pins though looking at the margins? Or should I just snap off 25 separate pins and solder each into position?
4 - When putting the motherboard back into the machine, I notice the SCSI chip is sitting under the chassis pretty tightly. Is there room under there for your board + cable?
Cosy SCSI chip
Sorry about flying in from n00b land, and thanks in advance for any pointers here.