Because of atrocities such as this:
and these:
I've now got this:
Waiting in the wings (or more accurately on the shelf) to be fitted.
Having modified the seat to suit my needs it occurred to me that I would probably need to hold it down in some way other than my bulk sat on top of it. Riveted and bonded these:
Which slide down the side of the subframe, and will bolt to the (now vacant) upper pillion peg mount:
I'll have to mod the seat fairing slightly to get the bolts in.
Just in case there's also this:
Which will have one single bolt going through the bumpad.