I plan to install a toilet next to the main 4" PVC drain pipe on a concrete slab floor. I dug out around the drain, and will connect the toilet to the drain pipe. My question is: should I use a saddle tee connection, or a tee with neoprene connectors? I know saddle tees are not popular with code inspectors. Is there a special PVC tee I should use with neoprene connectors, or is there a complete neoprene santary tee unit I could use? Also, any hints on how to cut the below-grade 4" drain pipe without digging a huge hole around it?