+1 This sounds great but I think there should be some kind of limitations on it with like the total variety of items you can auto alch. I think anywhere from 10-25 items would be acceptable, being able to set it up so you can auto alch any amount of items feels pretty OP especially for grinding cannon spots where you will be getting tons of drops for very little effort, the passive income might be too crazy.
Spitballing suggestions to add to this:
* Tier 1 and Tier 2 versions of the Spring Cleaner, T1 - Low Alchs, T2 - High Alchs (No one uses low alch but this is intended for items you were leaving on the ground anyway)
* Require this to be crafted after learning recipes for slayer points, make components as drops from various pvm locations (Maybe buy T1 in shop and upgrade to T2 via drops + slayer recipe?)
* Add springs to sof to give that just a little bit more value
* Besides just requiring springs to charge this make it degrade and require pris gems to repair as if it was any other piece of gear (but the gems instead of coins)
* Let me equip this in the ammo slot