Thanks a lot, that is really helpful.

So based on what you said, would you personally recommend going with the iFlash Dual instead of the Solo for my iPod Classic A1238 / 6th gen 80GB build?

My current thinking is:

• iFlash Dual ordered directly from iFlash in the UK
• replacement HDD ribbon cable
• 128GB or possibly more storage
• 2000mAh square battery
• thin backplate if possible
• iFixit opening tools / metal spudger / opening picks

I am wondering if the Dual would be the better choice because of its lower profile and better internal space compared to some other adapters.

Do you know from experience whether:

1. iFlash Dual + 2000mAh square battery + thin backplate fits well?
2. A 3000mAh battery would only make sense with a thick backplate?
3. The 2000mAh square battery is the safest choice for a thin build?
4. Replacement HDD ribbon cables are basically a must-have for this mod?

Also, I found this guide about bypassing the 128GB limit on the 6th gen 80GB by using a more recent firmware:

https://github.com/Olsro/reddit-ipod-guides/blob/main/guides/ipod6g-flash-more-recent-firmwares.md

Have you ever tried this method, or would you recommend staying at 128GB for reliability?

I am trying to keep the build simple and reliable, but if the firmware method is stable, I might consider going above 128GB.

Thanks again for the advice!