seaniepie

If you search on eBay for Apple Watch Assembly you can find some fairly easily. They tend to all come from China so in the UK it takes about 3-4wks to arrive. But the quality is very high and I can attest to that having used them a few times now. They're about £135 each at the moment incl delivery. You may or may not get a seperate vat bill through from customs. Depends on wether they've already met their quota ;)

The 2133 only has 1x 24mm T10 Torx

Interesting. I want to try that.

You can replace the battery and touchpad: iFixIt have a guide:

Battery and Trackpad. Disassembling MacBook Pro 15" Retina 2012-2015

Well spotted. There indeed is no mention of the force pressure sensor, the black strip around the chassis rim under the glass.

You don't need to unscrew to remove the tiny panel. It just comes out using a sharp tool like an artists knife. Unscrewing is only necessary to remove the contacts ribbon.

There's about a billion (minor exaggeration) steps missing here! Watch the video from 2m30s to see the plethora of ribbons and screws to remove. In fact, for replacing the battery most of the marked screws don't need removing. Concentrate on everything connected to just the top board (which sits on top of the battery).

The best 'in' for prying open the screen bezel from the back (or in other words, to pry off the back cover) is to insert a pick or pry tool just where the sim card slot is. The plastic here is a little more flexible and allows more freedom of movement. Don't apply too much force unless you don't mind the plastic snapping at the sim port. It won't be much more than cosmetic damage.

Move the prier towards the bottom. There is one of the holding clips just below the sim port and is rarely held by glue making it the easiest to pry apart. The next clip is about 2inches down from there.

Once the left side is pried apart fully (keep pulling the back case away till the glue snaps - there are no cables attached to worry about) force the back case to the right to remove it away from the clips on the right hand side. This is relatively easy in comparison to opening the left side.

Don't bother doing this step as it is not necessary to remove the glass/lcd first. I have proven this many times. Jump straight to step 4.

Yes, buy a microwave. They cost about the same as an iOpener!!