id like a rack that sits a bit further back, mines got a bar thats right at the end of the pillion seat so not comfy for pillion
I knew my top box was staying put so instead of using the proper Givi rack plate, i got some metal pates made up for inside and outside the box which allowed me to have the box a bit further back for pillion comfort, rather than to actually lean on.
I refuse to let any pillion hold on to me because if you need to do an emergency stop or they're not paying attention then they just end up constantly nutting you, so the original grab rail is easily accessible.
One of the best add ons though is that rubber matting you can see in the photo's, it totally plants a passenger in one place, they simply don't move or slide at all, it's a cheap but very effective bit of kit.