RE: What type of scale to buy?
I refuse to build using a scale. It takes all of the fun out of building, for me.
Were I flying in competition where weight was of critical importance, I would then use a scale. However, one of the reasons that I am a sport flyer is because I do not want to be bothered with weighing every little thing (within reason) and I don't plan on having a supply of contest balsa delivered to the house. I'm just too cheap. My models have been flying just fine for fifty years. Why ruin that now?
Ed Cregger