I bought suction cups from Harbor Freight but ended up not using them because I didn't trust them.
Last thing I need is for them to fail and break the glass.
I removed the glass by myself with no help (at Jooseppi Luna's). I removed the aluminum trims first with a rope. With a razor cut the edges of the rubber and once you have a few inches lifted just pull on it and it comes off in a strip. Push on the glass from the inside to separate glass from the rubber and stand the glass vertical and lift it up and out.
I didn't use the suction cups either during installation of the glass for the same reason. You need one helper to lay the assembly into the opening. Much safer IMO than suction cups.