My gauges are a heavenly modded version of theese same steel gauges 
Biggest issue with theese are, what have been pointed here too, that they will not work in IE’s below 9 (FF/Chrome are OK).
There are no way around that (tryed to found while i did my own ones without luck).
Yes, html5 are cool, but, so long a pretty big precent of the visitors use old IE’s (50% of all IE-users on my site use IE < 9), thanks to that XP-users are stuck on IE8, will it be a “problem”, have system what works also in IE8 or create 2 different pages shown depending on browser. Sigh…
After much playing i went to a version where i used my old gauges as base wich works also in older IE’s and copyed only needles etc codes from theese new gauges. No rocketsience inside, just plain canvas-code so its easy to copy once figure out how it works. As backgrounds i used screenshots of the generated gauges without needles/numbers. As result i got new gauges what works also in older IE’s