I've avoided truing my Mavic wheels for fear of twisting the spokes during tighting. Luckily they are excellent wheels and stayed pretty good until I got the Bladed Spike Holder.
I used this for the first time today. And yes. It works great. But I don't think I will use it again for years. Unless your building a wheel. Or like me. Just like to collect tools. Get it. What the hell.