Hey guys, I've been using Solo backpack sprayers for a long time, but they seem to take up a lot of space because the pump lever doesn't really fold up. They do the job well and I know there are better ones out there. I have been looking into SP Systems as they seem more molded and compact (pump lever) folds all the way up. Anyone have any recommendations? Are there other sprayers I should be looking at? Also, between the SP0, SP1, SP2, SP3 the pump is obviously different, but what are you guys using for herbicide use and what seems to last? Thanks.