Posted on another forum. Thought it might be of interest here.
Allen> "I always refer to the legend Doug Coombs for tuning advice.http://www.youtube.com/watch?v=4O5GUAtShiU
I'm with Coombs on this one. The only file my edges have seen in years is a pansar (Coombs called it a bastard but you could see from the close up that it was a pansar). I only need to do this a couple times per season. The rest of the time I touch up with a diamond file. I do use a file holder to get the bevel right. I don't have Coombs calibrated grip. I hot wax once every 7-10 days skiing. In between I use Zardoz. Great stuff. I also use it on the fuzzy side of my skins.
I'd rather fish than tie flies too.
Edited to say that nobody on the World Cup circuit is doing this. In fact they probably couldn't tune a ski to save their life. Their 'Techs' do it all, and have a half dozen pairs prepared with different waxes and tunes at the top of the course so that an up to the second best choice for the conditions can be made. If you're serious about racing or performance disregard my approach.