Hi, I am Scot actually.
The rolled part of the gouge tangs go about 3/4" into the balls. Golf balls also make good file handles. BTW, this is the best use for golf balls, says the frustrated golfer.
I tend to think outside the box for sure. When stabbing in scrolls I grab a gouge that matches the curve and work my way along. When I can no longer make the curve I grab the next smaller one and so on. The cutting end or the gouges are lens shaped. They makes really crisp stabbed in lines. Be aware they you must stab in accurately, if you move the line the old stab may show forever.
Disclaimer, I am no expert carver. I "cheat" any way I can. I can not draw, but I can draw or paint a fair likeness of whatever I want by using projectors, copiers, carbon paper, drafting templates and my computer to transfer the image. I then do something that is like paint by numbers. Since my artistic talent for carving is also low, I do similar things. In the end nobody cares how you made the thing.
I admire artists who can do a beautiful portrait with a sharpie marker and their eyeball. My Dad could do that. My mother did as I do. She had a local reputation as decent fine artist. Go figure..