it can be done !

我的问题

Malfunction as of spilling red wine over keyboard

我的修理方法

Great guide, the comments are the best part of it, alas I found them afterwards

Some screws (4x) were very tight and therefore damaged and difficult to remove (picture 1)

I used a needle file to create new grip and remove them

The battery cable connector (picture 2) also damaged

the picture in the guide suggests to pry at the corner, better try this slowly with different angles of attack

Luckily it operated normal in spite of the damage

The speaker connector also damaged (picture 3)

removal of the connector should be done very careful

it took some time to reinstall it in the proper way

Installing the track pad

So glad I came this far and tightened the T6 Torx screw of the track pad without checking... Experienced it during boot up, everything had to be done over again (second time was much easier)

Keyboard ribbon cable (picture 2)

though I installed it the right way

By placing the battery afterwards the cable is easily displaced and the Mac Book won't boot up

So I had to remove the under case for the third time

The lower case is constructed of rubber-coated aluminum.

the rubber coating gets lose when removing the lower case multiple times… (picture 4)

With the metal spudger the job was done

and YES in the end everything worked as it should. I fixed it !!

我的建议

Read the guide thoroughly AND ALL the comments before you even start