UPDATE. A couple of lime finger misteries solved.
1) The 60g fruits is not a myth. Lime fingers definitely can make much bigger fruits. I had seen one last weekend, in the middle of a shrub loaded with standard fruits. More than double of the standard width.
2) I did some research about the strange RodneyS plant with leaves very different from Microcitrus australasica. Definitely NOT the common australian finger lime...
I was given an Australian Finger Lime from a friend. I belive it's the green kind. Can't wait to try those citrus pellets
... BUT, can be still a finger lime.
Probably one hybrid from the species Citrus wintersii (formerly called Microcitrus papuana). If that, RodneyS could expect mint-green finger lime fruits with whitish green crystals.