I started with the frame and fork and am closing in on putting this Nishiki International (KS324163) together. I'm hung up on the derailleurs. From browsing earlier threads I see this needs a rear derailleur hanger, but the well worn Suntour VGT Luxe I bought came without one. Will any hanger do or do I need to find one that is specific to this bike/derailleur? Additionally, will any front derailleur do?