I found something else. just for fun
A Black layer under original
Original in Color Erase mode (or erase or split)
New from visible (or faster with merge down button)
Fuzzy the outside on the new from visible
select Grow 1 or more
delete
gap almost non existent (you really need to zoom in to see some trace of transparency)
A Black layer under original
Original in Color Erase mode (or erase or split)
New from visible (or faster with merge down button)
Fuzzy the outside on the new from visible
select Grow 1 or more
delete
gap almost non existent (you really need to zoom in to see some trace of transparency)