Had a RAM that worked for about 3 days with my 296 until I "rammed" it
(and that's what you have to do with this giant "unforced" suction cup)
for several hours on a car window on a hot and sunny day. After
removing, there was some black rubber residue left on the window and
the "suction" was gone - forever.

Trashed it and bought the GF-Mount. Excellent, even on curved ac
windows. It came off once in the past 18 months due to some dust on the
diaphragm. Know at least 15 other pilots flying with the GF and none of
them would ever change back to the yoke mount (or anything else).

Chris