I am debating which size walkbehind mower I want. I already have a mini z to get into the backyards. I was thinking about trading my mini z in for a 32 wb and applying the rest of the credit to a bigger z. Is that possible? Or should I just buy a bigger wb? I am looking at the quick 44. I would have a guy on the z in the back and the 44 in front. My business is set up for volume and I think this would speed things up alot faster with two mowers instead of one.