One problem that plagues me is getting a smooth ridgeless bottom on my bowls. At my local club, many of the show and tells that are passed around have slight undulations while some are smooth as glass so I know it's not just me.
Part of my problem is I can't seem to do a smooth even sweep from rim to center. What ever point that the gouge lifts from the surface is where a ridge develops. When I try to pass over it again the gouge seems to "ride the wave."
The other problem, which may be indicative, is too much material removed where the sides join the bottom. Somehow, as I'm dropping down the sides I dig in too much at that transition point. I'm never aware of this no matter how much I concentrate.
Any suggestions are greatly appreciated.
Burt