Kyser - and Spring-dunlop

First problem - that spring is TOUGH - particularly for feeble old men and wimpy people of gender and the 12-string ones are tougher still.

Second problem - the springs break.

Third problem - the sticky-up-arm gets in the way particularly if you want to fret one of the uncapoed strings when using a partial capo

Fourth - the flat rubber surface (like the Shubb in that respect)

Fifth - fretboard camber - like the Shubb too

Sixth - no control of strength of grip to limit the amount things get pulled out of tune.


Dunlop with the trigger underneath - ditto. Many a chord I cannot get with that lump underneath.