When the elevator stops at the 11th floor and the mech room is on 12....well that cart becomes a headache. They really need 4" wheels to clear all the cords laying on the floor on top of a mag lev option IMO.
True enough about the elevator thing. But as I mentioned, I don't always use the cart. Flat impossible in some situations. In which case I make do using whatever other methods are available. Either makeshift means, or I've been known to drag out another item:
http://www.walmart.com/ip/Lifetime-30-Personal-Folding-Table-Almond/20690055
That isn't the exact one, I don't think. But if not, it's close. Actually my wife bought a few some years ago, at Costco, I think. For around the house. I grabbed one for my use in case it'd come in handy while working. And it has, time to time.
A friend of mine uses a similar item almost exclusively. Uses a light weight folding hand cart to haul around folding table, folding chair, laptop bag, etc. Not my choice for the way to do things, but it suits him and that's all that counts ... for him.
As to the wheel thing, cart I have has 5 inch wheels. Came with that size. I replaced em tho, some years ago with a set of the same diameter, but with wider, rubber wheels of higher quality. The thing is there are always obstacles, but I put up with them just like other trades on a job site. But ... my service cart is smaller and lighter ... so I have an easier time of it. At only 24" wide can navigate easily through some tight spaces.
And even when I can't get right up to the exact place I want to get to with the cart, depending on what all I need to drag along with me for a particular job I might yank out the cart just to keep from having to carry (or pull) around laptop bag, tool bag, and other assorted stuff. Darn laptop bag has wheels and extensible handle, but sometimes I need additional stuff like a couple magnehelics, other pressure gauges, maybe the bigger/better DMM, plus maybe the big clamp on amp, portable drill/driver, couple extension cords, etc. Have one of those big open bay, heavy canvas bags with shoulder strap I use when I have to haul around a load. But would just as soon toss all that stuff on my cart and get as close as I can using it. Then hand carry the stuff the rest of the way if need be. I'm getting lazy in my old age.
I'm sure as heck not trying to sell anyone on my solution. To each his own. As others are doing I'm simply offering alternative ideas.
The hanging of my laptop from a magnetic tray doesn't appeal to me all that much. I'd be sweating the idea of tray falling, or tray getting tilted and laptop falling off. Damage to my laptop ... the prevention of same ... is one of my prime considerations. Isn't the replacement cost of a new laptop. Could hardly care less about that. I HATE having to get a new laptop just like I HATE having to get a new work truck. I have a LOT of assorted software loaded on my laptop. Some of it proprietary controls related stuff ... easily replaced and mostly not that expensive if already licensed and I just need to reload because I'm changing laptops. But it's a pain. Takes friggin hours. Then there is the reloading of MS Office, to include Visio. We have corporate licensing for that stuff. But again it seems to take forever to reload it. Then configure it so it works the way I want it to work. Downloading and installing Firefox and Chrome (I don't use IE), getting Java installed. Then there are probably at least 30 other utility programs I use routinely, made by others, and all free ... but gotta download them, install, and configure. Have a backup USB hard drive where I keep things archived. For instance, one folder named "Manuals". With many, many sub-folders to keep things organized. Just did a fast check, over 5300 files and greater than 10 gigs just for that folder. Then I have a "Jobs" folder, likewise with many, many sub-folder, and each sub-folder having many sub-folders. 38000 files and over 14 gigs, would be larger but I offload to archive stuff that goes back more than a couple or 3 years. Folder containing templates and examples for various tasks, folder containing literally thousands of graphics and stencils, and so forth. Would have to load all that stuff back onto a new laptop. Have done all this before, takes days before I have everything back the way I want it so I can work fast and efficiently. Cost of a new laptop is nothing to me compared to the aggravation of getting it all loaded up, configured, etc so it works just the way I want it to.
Kinda like getting a new work truck. Oh it's nice to have a new truck ... but then I'm fooling around forever to get stuff stashed into it just the way I want so that I know exactly where everything is and what I need most often is in an easy to access place. Last time I got a new truck, couple years ago, must've taken me 2 months to get it arranged, the re-arranged, and so forth until I was happy with everything. Until then I frequently was cursing silently and getting aggravated with the thing.
I HATE having to monkey around on a job. Want what I need NOW, easily gotten to, easily set up and worked with.