Morning all,
Many thanks crumpet for the extra photos. They are a huge help. Amongst other things they clear up my query about the blade drive. What an ingenious idea to use the transmission 'idler' belt for this! For all our leg pulling and smart comments it turns out there is a certain elegance in the belt/drive layup.
Trump-cat, I can't agree. While this particular example clearly demonstrates the key features of the coolbutt range I am certain from 'hard' experience that it is more likely from their sorebutt range of classroom furniture.
Cheers,