With Dave's tone on The Wall Live 1980-81. I love the wetness i know he gets with the Yamaha RA200 rotating speaker. but i can't afford it or lug it around. i need an alternative to get this tone and not a can't-be-stuffed one like Riis'. And i know all about the Muff-Mistress combination and you might get a similar sound if you run a second amp on a seperate effects loop. but what roto sim and SETTINGS!!! i am only interested in straight, detailed, well-researched explanations. please help a young lovesick tonefreak!