SteamDeck-Clover-dualboot VS SteamDeckAutomatedInstall

You may also find useful this project. It's a preconfigured Clover that can automatically reinstall itself after system upgrades. It automatically detects different OS on different drives and some OS are already preconfigured with beautiful icons. Works flawlessly for me, tested with Ventoy USB drive with multiple images and with Tails (Deck is an amazing device for anonymous Internet access!) on SDCard. The only things I adjusted were menu timeout and theme. I'm not sure if it's better or worse compared to refind.

I use SteamDeck-Clover-dualboot to manage a dual boot. Updates to either SteamOS or Windows will often mess with the boot priority, so installing this script on the SteamOS side tends to help. When one OS “takes over,” manually booting into SteamOS fixes it right up.

try this https://github.com/jlobue10/SteamDeck_rEFInd or https://github.com/ryanrudolfoba/SteamDeck-Clover-dualboot

Clover script

Clover: GitHub - ryanrudolfoba/SteamDeck-Clover-dualboot: Script to install Clover - a graphical boot manager for the Steam Deck.

and a dual boot GUI manager to select which OS to boot from. Currently it supports Windows (internal SSD, microsd, external SSD), SteamOS, batocera (microsd), ventoy (microsd, usb), Kali, Fedora and Ubuntu. https://github.com/ryanrudolfoba/SteamDeck-Clover-dualboot

A better approach would be to start with a proper ISO downloaded directly from Microsoft and run a post-install script that installs any applications, drivers, and system tweaks you prefer. A similar project exists that I use and recommend for getting a fresh Windows install running on Steam Deck.

The only thing different here are some inbox apps are removed and Steam + assorted drivers are installed out of the box, all of which you can do with a community installer script and community tweaking tools.

This guide sends you to this page to install a script that installs everything you need

Based on the powershell scripts from CelesteHeartsong which are available here: https://github.com/CelesteHeartsong/SteamDeckAutomatedInstall

Sounds to me like you want to fork the tiny11builder and add custom script for things like SteamDeck drivers and Steamdecktools.

Celeste Heartsong's Automated Steam Deck Install - Github

I went through the same thing, and every source I read said it's best to install windows to the SD internal memory and use SD cards only for additional storage to whichever OS needs it. I used https://github.com/baldsealion/Steamdeck-Ultimate-Windows11-Guide/wiki/1.0-Getting-Started, and then ran https://github.com/CelesteHeartsong/SteamDeckAutomatedInstall

Follow that, or on a fresh install (probably can just use on a current install, use https://github.com/CelesteHeartsong/SteamDeckAutomatedInstall/releases/tag/v3.4

https://github.com/CelesteHeartsong/SteamDeckAutomatedInstall/releases do this first