To find the manuals for OIWP products and the open source project, you have to go to GitHub and then find the matching product name's repository. You can find the older versions by seeing the commit history or visiting it's past branches.
For BabyDrone series drone frames and AirTag UTC, the first version was still in Google Drive, so if you want to keep it's former glory during repair, you have to head to Google Drive link of the repository.
If the part(s), especially batteries, made for Oitswilliam Hardware was not functioning as expected (such as unexpected overheating or shutdowns), you may report them through direct messaging to Oitswilliam in Facebook, X or Discord, whichever prefers you the best, or email for quality concerns, to not let manufacturers knowing. This report does not apply to user-built batteries, but individual batteries and kits can be reported.
You can contact us or the community for the exact installation or report for the design errors.
You can either join our Discord server or Facebook group for the community support, or contact via Facebook or X for the official support (weekends 3AM-4PM UTC).