I haven't done the rubber band fix, but the idea would be to hook it around a few things on the back side of the right hand support plate, stretched across the back side of the lever to push it outwards.

That sounds, to me, that you have an actual jam - that there is something in the road that is preventing the head from moving back and forth.

That lever’s job is to make the paper feed mechanism work the cleaning station. When the print head is way over to the right, it pushes that lever, which pushes a cog out to mesh with the paper feed rollers. Then, with the head in that position, the paper feed mech makes levers and wipers in the cleaning station work. Then, when the head moves away, the spring pushes the lever back, pulling that cog away from the paper feed mech, allowing it to move freely. When the spring breaks, the cheaning station stays connected to the paper feed mech, jamming it.

If the lever moves right, and returns left by itself without sticking, then your problem is elsewhere.

The part of the instructions that are a problem is testing with drops of water - The case of the phone might catch these drops and allow them inside the phone. Just don’t test it with drops of water and you’ll be fine.

I must say I don’t mind the tri-point screws. At these sizes, phillips screws are a real pain - like they aren’t at any size, think on - dropping to just three wings gives the screw a bit more meat.

But then again, I have a similar argument for pentalobe - that screw size is too small for torx or hex, Phillips is bad and wrong - pentalobe makes a nice, solid joint between screw and driver.