Thanks for all the info guys, they're fairly small still, maybe I'll try some in sphag, some in s/h and some others in the seedling mix from repotme? It's great that I have so many of them that I can experiment
Also Sonya, it seems Micro Chip and Aussie's Chip are one and the same:
"It was previously sold under the name Den. Aussie's Chip as a cross between Den. aberrans and Den atroviolaceum 'Pygmy'. However, this latter orchid has now been identified as a new species, Den. normanbyense, necessitating a name change for these plants."