Q2. do you ever use the square carbide blade--as opposed to the round--for your sandwich construction skis? If yes, for what?
Q3. What's your preferred edge set up, B, C or other?
Ya look at these from starthaus ???
Or maybe this thread
I am interested in this topic as well. I recently bought a new pair of skis and tuned the side edge with a file. The file was bumped up against the sidewall. I didn't want to buy a side edge planer so I just filed the sidewall off along with the side edge and it seemed to work just fine for me. Surely there must be a reason why people use an edge planer though?
^^^ if you don't want to go to all the trouble shown in the videos, you should at least consider using a 7 degree file guide and a bastard file to file down the side edge so it's just barely taking off some of the material from nearest corner of the metal edge. That way the edge you put on your side will not be interfered with and you can use some stones and make your edges last longer.
I agree with Mr. Schaffner, and I use the same round blade planer on sandwich skis. I don't know where the round blade for cap ski argument ever came from, but I don't like it. On cap skis I've had (various Salomon and Atomic race skis), the lip that sits over the edge is much larger than on traditional sidewalls. The round blade won't pull enough material without multiple passes with adjustments in between. A square blade at a high angle (greater than 7 degrees) will pull back the bigger lip.
That said, I only prep the sidewall for edge clearance. I do have a pair of fully prepped super-g skis I picked up secondhand where the sidewalls are as smooth as the top sheet - really nice, but I'm too lazy to do that. If I get beat because somebody spent the night wax and buffing sidewalls, so be it, I was too busy drinking beer.