I think I am going with a 5F1 Champ circuit. Is the 5e1 any different in terms of sound or level of difficulty in building? Based on my research, I think I am going to go with either Marsh or Weber. Who has the best instructions? The Guytronix .5 watt amp has sparked my interest as well with a ton of support with pics. Any thoughts on that as well? Lastly, do I need a multimeter that can measure 20 amps or is a max of 10 fine? Thanks.