Bleeding Brakes

[1moretoy]

Hey guys quick question on the brakes. All components are brand new. Calipers, manual master cylinder and lines. Calipers are C6 Zo6 corvette and a Willwood master. I asked A friend of mine who is a mechanic about bench bleeding the master before installing it. I didn't want to mess with fluid getting everywhere when hooking up the lines. He said to just use his vacuum system to bleed the system and not to worry about bench bleeding the master. What are your thoughts on this?