diff --git a/profiles/auto-upgrade.nix b/profiles/auto-upgrade.nix
index 7e38a47..e46b3f6 100644
--- a/profiles/auto-upgrade.nix
+++ b/profiles/auto-upgrade.nix
@@ -97,8 +97,8 @@ in
   ]);
 
   # lots of "empty" updates
-  boot.loader.grub.configurationLimit = 15;
-  boot.loader.systemd-boot.configurationLimit = 15;
-  boot.loader.generic-extlinux-compatible.configurationLimit = 15;
+  boot.loader.grub.configurationLimit = 10;
+  boot.loader.systemd-boot.configurationLimit = 10;
+  boot.loader.generic-extlinux-compatible.configurationLimit = 10;
 
 }
diff --git a/todos.md b/todos.md
index 7e3b9c8..4c0d441 100644
--- a/todos.md
+++ b/todos.md
@@ -48,6 +48,11 @@
 # selfhosting
 * [ ] install extra ssd in nox, make it zfs and mount to /var/lib ?
 * [ ] backup of nox:/var/lib
+  * rsync?
+  * kopia?
+  * borgbackup?
+  * zrepl?
+  * duplicity? no
 * [ ] hydra - perfect for CUDA and RISCV
 * [ ] [avahi](https://github.com/jakehamilton/config/blob/579827c699d9c78bd42e73f543eafb05a0d6c374/modules/services/avahi/default.nix)
 * [ ] [kvm](https://github.com/jakehamilton/config/blob/579827c699d9c78bd42e73f543eafb05a0d6c374/modules/virtualisation/kvm/default.nix)