Drkey. I did the first adjustment but i'm not satisfied with the results... i want lower action and the truss rod still feels good for making another adjustment, so...how much time between any adjustment is ok to wait?
You don't have to wait. If you need to make small adjustments, go right ahead and make them. Some people think necks need time to "settle" after an adjustment. I've never found that to be an issue. Some people actually put their guitar away for a day or two (or even a week!) after tweaking the truss rod, which is totally unnecessary. Adjust when you need to and get on with playing your guitar.
If you don't have already have a steel engineers rule (or the stewmac string action gauge) and feeler gauges for measuring neck relief, do make the small investment. It gets rid of all the guess work and optical illusions and makes life so much easier. No matter what happens, you can always get back to factory specification. And when you do dial in your own preferred setup, measuring and writing it down means you'll always be able to get there again.
If you want lower action you should adjust the bridge.
There is a time and a place for every adjustment and sometimes the truss rod is appropriate.
Saddle and bridges don't change height or position of their own accord. So, if over time our action changes then it can only be due to changes in neck relief (as the neck reacts to seasonal changes in humidity). In this case, adjusting the truss rod is the correct way to correct the neck relief, and therefore the string height.
Besides, we cannot break a guitar neck with a truss rod and there is a range of acceptable and necessary neck relief. If people know and understand what they are doing and want to make small adjustments to action with a truss rod, that's fine. Not enough relief - it will buzz on the low frets. Not enough height at the bridge - it will buzz on the high frets. It's pretty clear what needs to be done. It's not rocket science.
