Brompton seat post hieght insert

Just simple convert from scad to stl file. All credit too threedaymonk - thanks! It's lovely to be able to print something of use which really helps (and saved me £9!).

When I converted to STL files the catch wasn't present so i added that back.
I used a simple 3D program to cut the length of the insert to how high I actually needed it - rather than cut it after I printed it.
This great youtube video (nothing to do with me but very helpful) explained to me why i needed this and I'm so glad i have it now!
https://www.youtube.com/watch?v=5X2aj-Pk1V4