About the z36R....I never thought about the sight line for refilling tank. That could be an issue from time to time, if you get to pouring in water then cannot remember how much you put in, you cannot reference the tank to figure it out. I am very close to going with a GL, esp with the improvements. Who out there has run the optional spray bar on it? To me that would be a must, so you could have an overlapping pattern as opposed to a single 'spitter'. I think the Jr36 would come in a close second for me. Ability to do hills is a must and the z36r may struggle in that regard.