re 1c. That's great, thanks so much for your reply. It sounds like I need to do a bit of research on saving patches.
re 1b. I had meant to write midi fx modulator rather than audio fx modulator, sorry. It is certainly possible to use the LFO here to control a single plugin parameter, but to control multiple seems a little trickier.
Plenty to go on here though, I'll have another play and see how far I get.
Thanks again