Hi all,
Sorry I never let you know how I got on, but a dead computer and pressure of work have left me pc-less until I was able to sort out another system...
I got the BX back on the road almost a month and 800 miles ago, and, fingers crossed, all seems fine. Thanks all for the excellent advice!
It was a pill of a job, particularly in winter in an open car port, but it's done now, and the skinned knuckles have healed [:)] but the new phenomenon of contact dermatitus will probably stay with me for longer [V]