You presented a good way of presenting this change!

please make the default on the voting bar 12% voting power which is consistent with the old 40 vote rule.

I just made the same comment on theoretical's post. I also think the slider should display as just a number showing the percent of whatever was last chosen, so we don't have to move it to 12.5% or whatever value we will generally be using, each time we vote. Click the displayed percent to bring up the slider to change it.

An even smarter solution would be to default the slider percent value to reflect a person's voting history. If they have been voting 10 times a day on average, default the slider to 50%. If they have been voting 5 times a day or less, default it to 100%. If they have been voting 40 times a day, default it to 12.5%.

There might even be an option one could select, to have their slider percent adapt automatically over time. Say, by averaging their votes per day over the last 2 weeks, for example. This would be a way to insure that everyone is voting maximally without them needing to think about what to do with the slider on every vote.