A color sphere has a plurality of organized color cells. A charge pump circuit includes a clamp circuit, and based on the control signal, provides a control voltage of which lower limit is the reference voltage level. Then, divergence or numerical apertures of the light generated by these elements is modified using an optical element that either re-images the light onto planes conjugate to one or both of the pupil defining element and a field defining element or transforms a numerical aperture of light produced by one or both of the pupil defining element and a field defining element. A tool is provided for providing enough leverage on the collar to slide the collar over final portions of its movement as the collar slides into the bore during tine installation or to slide the collar over beginning portions of its movement as the collar slides out of the bore during tine removal. Any part of the internal or external tool receiving portions may be substantially formed from a multi-layered piece of material.