adapter

Hi! I Own a Vstrom 650 cc 2015. I already bought the Eibach rear spring 8 inch x 2.25 inch / 750 Lbs... I'm looking for the adapters (bushing and collar) to fit it correctly, but I see that Procycle comes with 3 adapters and Race Tech has 2... Which one is the correct?

Confused on what adapter I should use for the Givi E45 as a topcase. Confused about adapter differences between Givi 528 and SW-MOTECH. Not sure if I have a choice between E528 or SW-MOTECH Toprack, or if the SW-MOTECH can only be used in conjunction with the SW-MOTECH adapter. Just want...