Checking on Harley's site, it says you have to buy bullet signal lights to use the luggage rack. Anybody know why? Is it really necessary? I'd rather not spend another $125 but lights I don't need. Thanks, Keith From Harley's site: Chrome Saddlebag Supports Fit with or without Sissy Bar Uprights, attach easily, and protect bags from contacting brake and swingarm. 90589-91D Fits '91-'05 Dyna® and '96-'05 FXDWG models. ('02-later Dyna® models require separate purchase of (2) Bullet Turn Signals P/N 68425-01 (Domestic) or 68420-01 (International).