Kung hindi ka gano marunong tumingin kung authentic yung guitar, Dean in particular, and hindi mo alam what to check, tignan mo lang yung bridge. Kung double locking, kahit dun mo na lang tignan. For example Floyd Rose Special yung tremolo, it should have the "Floyd Rose Special" engraved on the plate of the unit. Most fake Floyd Rose have misspelled names and have sort of sharp edges compared to original ones. Tsaka mararamdaman mo naman yun. Magaan tapos it doesn't stay in tune.