Now that I have the LCD nicely fitted in the printer it is the turn of the RAMPS/Arduino board(s).

I printed an adapter (the model can be found in the files section and it is using the same printer! ):

It is meant to fit where the old board used to be (but is much smaller):The board inside the adapter(with the help of hot glue):

And all inside the printer:

And with the lid close(this marks the end of this conversion!):