Thanks for your replies so far - please keep them coming.
I already have the air spring conversion so I think my next one will be the belt drive kit - unfortunately doesn`t look to be available from a UK supplier - can anyone clarify this?
I have still not seen anyone mention or send a link to the spring loaded spindle locking pin?
I may consider the column support - I could do with some plans though! - I`m not an engineer by profession and therefore struggle replicating pictures without detail or ideally plans.
Please do link up - I am familiar with "search"

but you know what it`s like, most of you guys have been on here for longer than me and know what posts are best for the info.
....keep it coming. Chris