I went through all the distortion effects, testing with a single coil pickup guitar and narrowed down but then tried GX-Amplifier and wow! The distortion and overdrive you can get out of that as well as a whole lot of tonal colouration is fantastic. I will probably use just this for most of the guitar sound. I added Roomy reverb and got this:
I am finding it quite tricky to audition stuff using the standard UI, having to add and remove effects which is awkard so I started to use Mod-UI which makes things simpler.
MDA delay works well and C* PhaserII sounds just like my old pedal I had back in the 1980’s. dRow Audio Tremolo seems okay - not played too much but seems to work.
I want effects that can be bypassed or mix adjusted so that I can set up a chain then adjust the parameters to add / remove / alter effects in that chain. Mod-UI allows bypassing any effect but the normal Zynthian effects chain does not so you need this feature within the plugin.