This is the plain floor for my various N-gauge / 2mm:1ft warflat chassis models, complete with retaining pieces for both the N-gauge Society and Graham Farish diamond frame bogies. There are availability issues with both of these bogie options, so I will entertain requests to to design different pieces for other bogie designs if necessary. This floor is practically the same as the corresponding part in the former Parkwood Models kit, which is now owned by the N-gauge Society but currently unavailable. When I spoke to an officer of the Society recently, he said that the society wishes to promote the hobby not hinder it, and that I am co-operating by making my parts interchangeable with theirs (with a little filing and scraping to perfect the fit) so there is unlikely to be any objection to this item being available for sale.