Hi Flyingdoctor, I agree with the sentiment "get on and do it" and that is why I made the rack for my top box, but I decided more thought was needed to mount panniers as it's not as straightforward as it seemed at first. Making haste slowly is often the quickest way in the end. It's good to know that it is possible to get used to a lopsided look though.
Hi pbekkerh, thanks for the info. I had thought of making the panniers different sizes but was not sure how it would work out, but from these images I now have no doubts. I was going with "soft luggage" in mind for financial reasons but will reconsider that now if I can lay my hands on some sheet ally at the right price. It makes use of the space below the exhaust which soft luggage would waste.
Thanks again and back to the drawing board.