Good deal. Looks like 23 AWG is about 20 milliohms per foot, so 100' is about 2 ohms. That probably really did make a difference. Keyed up at 50W with the engine off would be the worst case and sounds like it worked fine.
'91 Toyota Pickup
'09 Kawasaki KLR650
'12 Gunnar Rockhound 29
"To live is to suffer, to survive is to find some meaning in the suffering." -- Friedrich Nietzsche