I need to replace the brake master cylinder on my 2010 Nissan Murano. I already bought the new unit. The instructions give a choice of bleeding methods. One is to plug the ports and pump the piston until it can't move. The other is to use bleeder tubes that direct the fluid back to the reservoir. What are the pros and cons of each method? I have the plugs for the ports, but I don't have bleeder tubes.