I like to use star washers with the serrations on the inside- - - -less likelihood of getting an oil leak onto the clutch since the flywheel bolt holes go all the way through the crankshaft flange and bypass the rear oil seal. Blue Loctite is also a good idea, since it seals the thread as well as keeping the bolts tight. A properly torqued bolt doesn't need a lock washer in the first place, and one that's not torqued correctly will loosen up no matter what kind of lock washer or tab is used.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!