Hi Alan,
I am currently adjusting the Wades Block so that I can insert a PTFE liner leading to and from the Hobbed Bolt and Idler Bearing. I have some 3.2mm ID/6.2mm OD PTFE tubing for this purpose.
As far as actually printing with flexible material, I have not tried that yet. I will print a few modified blocks (I always like to have spares) and then put one in place and give printing a go. I am sure there are lots of caveats to making it work.
Regards,
Neil Darlow
I try to write with consideration for all nationalities. Please let me know if something is unclear.
Printing with Mendel90 from fedora 25 using Cura, FreeCAD, MeshLab, OpenSCAD, Skeinforge and Slic3r tools.