This is my first stumble in 3DCoat and I've done some impressively innovative things with it... I am not certain how threading is embedded to a primitive object, voxels or parametric? This maybe a coding technicality / resolution; in order to reverse the tighten down direction, a coded applet parameter would be required, if not already available; I do not see it? So to simply invert as said by stusutcliffe; it would seem to work, but further was said by philnolan3d; true, a nut is a nut no matter the flipside. So one has to invert the direction of the cut threads in order to get reverse action... This would be a great feature addition; then fasteners will not loosen under certain rotational applications. I don't want to leave this great software environment over a minor engineering technicality; Fusion360 is not as productive / intuitive for my taste. Thanks All... let me know if I have missed a crucial feature or widget here? Thanks...