Iv just started using wfp for a few contracts been trad for 15 years all domestic work with high density of customers in each area can't figure out how I could use wfp effectively for domestic work ANY HELP APPRECIATED, but , that trolley system look's very overpriced i use a big boy backpack on a trolley strapped on with bungee cords and fill with 25l drums for the few hours I use it every month it works a treat