Good point about the long arms. I guess in theory, if your arms are long enough, you could basically have a straddle cable flat across. With every unit of cable pulled from the brake lever, the arms would move together by that same amount (one half on each side), right? That would essentially "convert" their geometry to that of linear pull brakes, right? Where you get one unit of brake arm convergence for one unit of cable pull? In that case, I guess a long pull lever would definitely be the right lever to use.

Am I thinking about that correctly?