I am looking for ideas to help make a decision which tuner design to build, and more importantly, why. The reason I am building one is simple. I need to be able to flatten the line when I QSY to a frequency where my antenna is no longer resonant. For example, the new antenna I am building and erecting soon will be coax fed without the use of a balun. It's a 3 band fan dipole for 75/40/20 meters and the 75 meter antenna will be cut for resonance at 3850 kHz. I move between the Extra Class portion to the General Class portion daily. The 40 & 20 meter bands will not need likely the tuner at all, so it will be switched out of circuit when using those bands. So, considering my requirement for band usage, the real reason for doing this is to allow my Bauer 707 to be happy at full power. The Johnson KW Matchbox isn't capable of handling a folded dipole and ladder line at full power... it arcs. I don't want arcs, so I am building the new antenna and ditching the open wire feed. The components I have chosen for this antenna can withstand 10KW with ease but that's because they are on hand and of the highest quality. I just want to build a tuner once and forget about it and never worry about voltage breakdown etc. I will not have to be matching complex loads way off frequency either like attempting to run 160 meters on a 40' ft whip, crazy stuff like that. And, I will not be using ladder line, just coax. Which design would you suggest? Pi-L, T network etc, and why? I am very curious as to the suggestions and the discussion ahead. Thank you in advance!