I am about to pick up the Beall buffing system and curious to know which waxes are used on the third wheel and why. The carnuba bar comes with the kit, Ed Davidson uses Ren Wax in his video for bottle stoppers and I know many here are fans of TSW. I pretty sure its not a good idea to mix waxes, so do I get multiple wax wheels or is there not much of a difference. I will be using this for both wood and plastic pens.