I know this probably has been beat to death. Kinda like an oil thread. I want a small tank bag to keep my phone,gloves and a few small things. I am looking at a Givi or BMW. I could use some advise especially on how they mount on a GS. I have a 2011 GS. I dont want the tank bag on all the time just on trips so I dont want a big mounting system that is on the bike when the bag is not on. I am new to the GS world. Had my bike about 2 months and am very hooked on this thing.