Thanks guys. Yeah I remember when dad adjusted rods, he'd give them a small turn then set the guitar aside for awhile. sometimes he'd adjust my necks and say give that a go for a day or so then we'll have another look.
I've read about setups etc and know that truss rods are used for getting right relief and not as some people think....to set the action . Its just that I worried about it a bit but I suppose if I did it the way my dad did ..little by little, I shouldnt have any real problems. On another note, my young son lives interstate and had a fender p bass that needed rod adjusted. Took it to a guitar shop and it was a little better but after awhile had a great bow in it again. When he took it back to repair shop again, guy said the rod was snapped. Guy played around with it and i think did some little mods (not sure what they were at present). This is what I was worried about. I do a few small wiring repairs and play around with electronics but I am now interested in doing setups and some body repairs as well. I was worrying a bit that if I adjusted anyones truss rod. And they later had major problems with neck, they'd be blaming me.