The tapping technique has opened the guitar to new possibilities. Tap-guitars can be tuned in one or two regions, in fourths and/or fifths and there are many varieties.
In the folllowing link you find ‘Tunings’ , the chapter three of ‘My Space’ .
https://1drv.ms/b/s!AhZLo3TFhkcTr_AZ-z3K81kFzMt-QA
‘My Space’ can be ordered through clic@clicmusic.be