Rotring isograph grip

replacement grip for Rotring isograph, in case cracks on threaded part of original grip or you just want to change color of grip.

Full redraw, now in SW and with much lesser clearance, so before print test model and scale it in XY axis to easy screwing on and apply this scale to main model (for my printer it was 106%)

Changes:
redraw in SolidWorks 2017
walls 1 line thicker
drawn with smaller gaps

p.s. sorry for my english