That just about says it. I have rusk Swingle and Trifoliate seedlings. which is compatible.or best to graft fingerlime to. any other info would be appreciated. thanks in advance.

Citrange is the most common one used in Australia for Fingerlime cultivars, and seems to have good results.
A lot of the grafted trees are going to be grown fairly close to the natural range of the plant, so any dormancy due to Trifoliata may not be wanted.
I have used citrange, swingle and rough lemon,but not had much luck with
Trifoliata,but I think others have used it.
Some people in USA and Europe may be dealing with fingerlime hybrids, which may be more Trifoliata compatable ?

The true Fingerlimes, Microcitrus australis are wild plants, so each selection is variable in many factors, including best rootstock to some degree.
If you have enough buds, I would try both, Swingle should give you a bigger plant faster.
Anybody using Trifoliata for true Fingerlimes ?

I have true fingerlimes on both standard Trifoliata & Flying dragon. Both are doing very well.

I have true Finger Limes and Round limes on standard Trifoliata. Also, From URC seeds I have Inodora - Russel River Lime and Virgata - Sydney Hybrid on standard Trifoliata.
I'll try using Swingle and see how it compares.
Terry