Thanks for the Titan extruder. It was quite a lot of work to put it on my Mendel90. I wanted the lid facing the front which meant a lot of work with a hacksaw on my frame and printing new parts. I wanted to use some PETG filament that was only available in 1.75mm and the way the Titan allows easy swapping between filament sizes sold me on getting it. I am impressed with how quietly it runs. I think you have created an industry standard for extruders. Well done!