After 9 months of printing, close inspection of the 0.35mm JHead on a Prusa i3 printer shows considerable wear. The affects are not visible in print quality which are still good however its becoming harder and harder to get filament to stick to a heated bed. When printing the first layer as the printer puts down a parallel pass of filament the head pushes the neighboring filament a little, if the first layer height is not adjusted just right the piece has trouble sticking to the hotbed and warping of thin sections away from the bed is highly likely.
With a new Jhead the first layer height is much more tolerant of slight errors.
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