Mrs Matt allowed me an hour in the shed just now, so managed to relocate my Ortlieb set up.
Looks good and just awaits a test run.
Thanks Andy for advice.
I will keep the extra bar where it is and locate my new to arrive soon Cateye Adventure speedo and Garmin etrax thingie on it.
Looks like the spacer issue is a non starter but comments on juggling them about always welcome.
Matt - as some may say - well and truly behind bars.