I have the Alesis QS6.1. Configuration #3 gives you lezlie+reverb. Configuration #5 gives you overdrive+leslie. In config 5 its an all in one and actually has 6 different effects in all on the Send 1. Send 1 is the Overdrive effect giving the classic distortion. From there overdrive is sent through a balance fader, than to a stereo delay, from there to stereo reverb, Output of reverb is summed to mono and sent into a stereo Lezlie. From there to EQ and from there to main left and main right outputs.