I haven’t used a 60x microscope yet, and had a visual confirmation, but just from the symptoms these seedlings are expressing with canoeing of the leaves, and the mosaic pattern on the leaves that these are indeed russets or broad mites.
Well, needless to say I’m concerned I have the dreaded russet or broad already on these young seedlings signs point in that direction and wanted some of your brilliant input RIU, so here’s some pictures.