The circuit in question is this: http://uzzors2k.4hv.org/index.php?page=450vboostconverter
It's well within my abilities to build it as-is (and indeed, I shall, once I've scrounged up some cores to wind the inductors), but I also have a few Tiny85's in the mail due any day now, and I was wondering if the circuit could be simplified in terms of component count by getting the 85 to do most of the work? It seems like I could make it pretty small with only one IC and for my application, the smaller the better!
The idea I had was to get the 85 to generate the switching waveform and also read the cap bank voltage through a suitable voltage divider, with a few pins left over for LED indicators (charging/ready, probably will use a bi-colour LED here). Any reason why I couldn't/shouldn't give this a shot? I reckon it'd be a good way to get used to the device and start building circuits around it. Already got the necessary Arduino cores (I think!) and have read up on programming it using a board I already have as the ISP.