Mamiya RZ67 TS adapter

Since several years I'm the proud and satisfied user of a RZ67 ProII with a lot of lenses including a 180mm SB; after one year of shooting with the Rolleiflex sl66se it's starting to nag ! Why hasn't my RZ this beautiful 'tilt' function ? A.: buy the Mamiya TS adapter with a 75mmSB lens! Q.: is this thing in everyday use as easy and simple as the SL ? and do I have to buy a SX701 groundglass too ? and what is this groundglass do?
What I need are; experienced users. Thanks