I can't see any detail in those screenshots (you need to convert png to jpg to prevent the board from scaling them to a tiny amount.)
The number that is important is the mA being drawn. You can see this number in the log view, or on the real time widget display.
The thing you want to compare is the mA draw when idle "stock" and then "after the mod"
Unless those numbers differ by 10% or better (which is 110mA at idle, and 330 or so under load on my GTablet, so 11 and 33 difference) then you've not really saved a statistically significant amount of power.
For that, you don't need to run a test for a whole day. Up the sampling and reporting rate on batterymonitor widget to 1 minute. With the old system, turn on the tablet, and leave it on unplugged for 5 minutes. Then run benchmarks on it for 5 minutes (or do the setcpu stress test for 5 minutes)
Look at your log in battery monitor. Record the average idle draw (should be in the low 100s) and the under load draw (should be over 300)
Repeat the test after doing your modification.
Post all four numbers here. I can tell you exactly how much more battery life (if any) you will get with your mods
