i use my auger with a drill on it and drill a hole at an angle pointed at shanty and the leave the auger in the hole top leaning into the wind and toss the pull rope over it and let it rest on the ice. most of the auger is out of the water. i keep a few layered shopping bags on the drill. watch out for sunny days to see if the auger is slipping or melting the ice.
i do like the eskimo ice anchors, but no need to use one when the auger does the same thing. i use those on my hub shelters only.
some people make a tube ice anchor from pvc to put down the hole you make behind with your auger.for me this is just an extra step and could be harder to remove than the auger.
keep your cleats on in case you get pushed. i always lay it flat when it's super windy and when i am not in it. the slush works good for bare ice to keep it from slipping around as much. kick the shavings to where you'll have the tub sitting then pull the tub over them and when you sit down it melds the shavings.
which color support bars does your fx100 have, black or silver? if it's black bars does every thing seem ok?