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I didn't see the analog board in that link so here it is: https://drive.google.com/drive/folders/0B_Xp3uN-BcxsQjFLRUZqeEw2VFE Look in the other copies folder.

This?

Here is the final Design:

So the original 40mb hard drive is 101.7 x 70.1 x 18 and the SCSI2SD and adapter is 99.5 x 55.1 x 17.1 (with the cover on the scsi2sd). I have also designed a caddy of sorts with the correct mounting holes:

Thank you for your encouragement! There was a bit of trial and error and research involved. I'm going to try and use the other half of the comparitor to release the relay when both charging ICs signal complete.

It will be smaller than a hard drive, I can probably design and 3d print a mounting solution. Anyhow, the new board comes tomorrow so expect an update then.

If you take the scsi2sd out of it’s case, it and the adapter should fit in any scsi powerbook.

Digikey or EBay is probably your best bet.

LOL yeah, those powerbook scsi2sd cards have become unobtainium.

You must not have read the full thread. 

There's nothing I'm working on 3d wise at the moment. What else are you interested in creating?

We’ll be excellent for clearance with the new version with the correct db25 orientation.

We have a thread already: I also made a good bezel for the Q950.

So here’s a thought, During my work on my Powerbook 100 battery, I was trying to find a suitable hard drive replacement as the Conner 20mb hard drive was clearly on last legs. I first looked to Inertial Computing who did not have any SCSI2SdD Powerbook variations in stock. Second, I looked to...

Well, the schematics are available: https://drive.google.com/drive/folders/0B_Xp3uN-BcxsQjFLRUZqeEw2VFE?usp=sharing But mostly if I suspect a bad trace I'll uncover both ends by gently scraping or sanding the surface to reveal the copper and then test continuity. But I'd suggest waiting for...

Actually, Those are probably mostly okay. But mostly okay is like mostly peaceful, you're probably going to have at least problem trace. I suggest to go ahead and recap it and see if it works, it may in fact work. Who knows? Case in point, I had a SE/30 board I bought on ebay that wouldn't boot...

I guess so and thank you for that! It's nice to get some funding for research!

Exactly! This is the only way I know how to make it work, but for a computer model that has not had any working batteries for sale in quite a while it's probably not a big deal to have to shut down before disconnecting, if you don't it's not like the computer is damaged or anything. Maybe I can...

It's not that simple, There simply is not enough voltage to charge the pack as a 2S so the relay switches the battery between 2S and 2x 1S for charging purposes. During operation cell 1's negative is connected to cell 2's positive but during charging cell 1's negative is connect to ground and...

Today I tested the voltage curve. I wanted to make sure the laptop would display a low power message before the BMS cuts off. I ran it for about 3 hours of mixed use and got a low battery notice I ran it for about 30 minutes between low power and critical power and the laptop was still going...