When working with a contractor, don't make final payment or sign an affidavit of final release until you are satisfied with the work and know that subcontractors and suppliers have been paid. State lien laws may allow unpaid subcontractors and/or unpaid suppliers to attach your home.
You can buy several types of guides that attach to your router so you can create decorative circular grooves on the surfaces of wood projects, or you can make up your own. Besides making grooves of various designs by switching router bits, these jigs can also be used to make circular cut-outs. Instead of cutting only partly into the surface, continue with shallow passes until the cut is all the way through the wood.