Changes
/* Finding proper joysticks */
Such a custom device would need 2 controllers connectors to be used on an Amstrad plus, but may be implemented directly for a CPC (old) usage.
==Finding proper joysticks==
It is not that easy, especially for the PLUS range.which may make full use of the 2-buttons features (some Cartridges games) or when dealing with modern CPC/Plus games including this feature in gameplay Some CPC era games included a more flexible "redefine keys/controls" option so you could use the second button
Not that Amstrad was uncompatible with most Atari Standard joysticks.