FTDNA is dribbling out the Z series snps for I1xL22 at a snail’s pace. I don’t know why....? Who should do Z60? It is downstream of Z58 and Z59. Z58+ folks are showing up both Z140+ and Z140- Both initially should do Z60. Z140 is placed even further downstream from Z60 If you did Z59, it is between Z58 and Z60 on the y tree according to 1000 Genomes. So advice would be the same. Do Z60. If you are Z63+ and/or Z58- I would say doing Z60 is much lower priority and a long shot to being anything but ancestral (negative). But 1000 Genomes 15 dna samples or so and the I1xL22 tree they built from those samples has been off the mark as well as on the mark. Those limited samples missed the very large clades which have turned out negative for all three entry level snps --- Z58, Z63, Z131. The Z58- Z63- Z131- population takes in a number of solid clades. And although 1000 Genomes claims they had a couple Z131+ among their samples, testing for Z131 at FTDNA has turned up none yet. A number of other snps for I1 have not been put into the FTDNA catalog --- DF29, Z73, Z141 seem most significant ones to me, but there are also z61 and z62. So we wait. See “Tree for I1” at http://knordtvedt.home.bresnan.net for my latest interpretation of the Z series results known up to today and the relationships to the earlier identified clades. Ken