Thanks first to those who posted that the 7/8" combi-cam locks would work
in the 2720. I found that the installs needed some special attention, and
note those below with pics. The pics tell it all.
Front hatch - old locking lever is used to fit right. Front-in pic is actually
upside down due to hatch being opened and up.
Shower hatch - old locking lever is used to fit right, but requires a 1/4"
bend to fit into the locking slot.
Rear hatch - old locking lever is used.
No more fumbling with the key...
Another post with 2 more pics -
Happy Camping!