I owned an Omni and I say no on that one. Definitely no on the older ones with a slower extruded base, but the newer ones have gone to sintered. I found the taper unnecessary since TBT floats enough without it and it makes riding switch unnecessarily awkward.
15 NS Ripsaw . 14 NS Proto HD . 14 NS Cobra . 13 Gnu Space Case EC2 . 2013 Salomon Pow Snake
14 Now Drive . 13 Now IPO
14 Flow Hylite