Its been a long wait

[GrizzlyBathplug]

Thank you Hutch
Like i said, you really are the font of all knowledge.
I will look at this option of attaching tubes as guides.

 

[Hutch]

Grizzly, look what I found,
https://www.al-ko.com/shop/uk_vt/comfort-kit.html

 

[Lappy]

Hi GrizzlyBathPlug,
I apologise for the long delay for my reply, but have ben busy over the weekend.
I just get on my knees to locate the winder bolt, but a friend who also had an Astella fitted wastepipe to the underside of the floor and this made locating the bolts easier, as they acted as a guide tube. I do not find it a problem and therefore do not feel the need to make any adjustments.
Regards,