Could also use some ****** blocks and appropriately rated rope. Would be wimple and fast and you would have to change your set up. The pulls all looks like the easiest way to go though. Good thinking there.
I work for a landscaping wholesaler. Big name one, there may be a location near you. Pm me and I'll take a look.
Couple questions though.
1. Is this in a turf area and your looking to get rid of dandelions and crab grass?
2. Or are you just looking to kill it all. That's what roundup does...