I think the best option for rearsets is for us all to be nice to fil2's mate who made some neat ones for the SSes.
They are simple, robust and with easily replaceable parts.
It would be really easy to have different mounting plates to suit the monster.
If anybody wants pics of rearsets on an SS, an 888 or a monster, with dimensions to compare them ... I will go and take some, cos I have one of all of the above
(well, sort of)