yeah no need for puck.
i run a 212 now, with a trd cover and normal organic full face disc and its great. hooks up good, cover is decent heavy so that helps with pedal feel.
most puck clutches arent really toooo bad to drive. but its driveline stress you dont need if youre not making the power.
re the os giken. ive had an os giken super single before. ridiculous. like so stupid. really quite dangerous to drive in traffic ect. very easy to stall even driving it every day... just done see the point. track only, with a really strong gearbox.. maybe.. but i hated sometimes.. sounds cool though.