LooseHot End Screw... A Good thing?

[WayneC]

I have a two headed Felix. I have been running the printer with the extruder tightening bolts intentionally loose enough to let the extruder move up a bit during extraction. This provides some vertical clearance between the unused extruder and and the surface of the print job. This hasn't solved all the issues I am having with the second head, but it seems to prevent the unintentional deposition of filament from the unused head. Do other people do this?

[Dreide]

Yes, the principle is used with this extruder: http://www.dglass3d.com/product/autolif ... -hot-ends/.