4th gen is actually a lot easier when you get the hang of it. Like PoJ said you should start with another kind of abuse. Calibration was only used because Pikatimer and Eontimer did not exist back then, other than that..no you don't have to. I timer have the default settings which are a beep for the last 6 seconds, after a while you get use to just do by ear but when I first started looking at it while hearing did wonders. Just hit A when you think the last beep will sound at least that's how I do it.
Chatots will always advance the frame by one just like they do in gen 5. About using Eontimer, press A to Select/SR the game when the first timer hits 0 and then again to enter the Pokemon world when the second timer hits 0.
Gotcha. I think I understand the process much better now, but I'm not going to be content until I RNG this damn starter. If I'm hitting rather close to the desired seed, could I adjust the timer just by knowing the nature/rough estimate of the IVs?
In gen 5, have you ever noticed that sometimes it takes two Chatot calls to advance the frame? When I'm hitting PIDs 100-200 away I often have to do an extra call or two.