i work in new york and at certain instances my company send me out to get them out of a jam. so i use taxis to shuttle my self to and from jobs. so the systainers are a perfect medium for tool transport. unfortunately some tools do not need a separate systainer for each tool. we can gang them up in a single container. such as the fein multimaster is put in a small military bag with another smaller klien bag to hold extra blades and scrapers. then my festool CSX drill goes into another of those bags and i throw in countersinks, tips, drill bits , a few smaller spade bits, carbide burrs, and a small assortment of small screws. a posidrive screw driver. then with a about four of these in a systainer 3 or 4. then in others i gang up more tools , i have a dandy portercable 267 plock planer that gets me out of jams as well as a makita 3/8" belt sander for strike plate filing, hole enlargement, what have you. i do this because i can pack the most stuff in the least amount of boxes. i also have changed out my wheels on my carts to inline skate wheels that are now ball bearinged and also work with the original brake mechanism. an easy retrofit. the only thoing you must remember is to keep an eye on it, because i had to run after one down the side walk. These wheels will make the originals feel like square wheels, especially on exspansion joints in the sidewalk.