Hmmm, the offset on my set is right (sit about 5 mm out from the spring capture) and they sit a fair bit out from the gaurd (enough so putting it inside the gaurd would easily make it rub against the spring).
Mr Oizo isn't yours an JZA? maybe the gaurds are a little wider than the '86 GA-70?
But then again, i could have just $$% up
EDIT: Did a little bit of reading and:
GA-70: Length / Width / Height (mm) 4620 x 1690 x 1310
JZA-70: Length / Width / Height (mm) 4620 x 1745 x 1300