Using the Cali rackspace from @chris_g as a template, I expanded it to include each amp type, inputs and outputs, stomp boxes, cab mic settings, EQ and effects. This was designed to use few instances and allow many variations. Some testing revealed hit or miss results with the plugin types. When scrolling through presets in the plugin, VST3 did not update many of the widgets, even with widget refresh enabled. AU updated all the widgets reliably, though some important widgets i.e. Amp Type and microphone type were represented by numbers instead of their names. VST2 worked the best, updating all widgets and displaying names instead of numbers. Please note that the plugin is wired in mono to input and output channel 5 on the audio interface.
Fortin Cali Amp.gig (1.3 MB)