we all have off days,doesn't matter if your state of mind is good or that you had a normal day/days leading up to going to the field.why the heck is that?it is reassuring to know that everyone at one time or other has them too..........i used to think maybe it is bad karma,or that one kid that put a curse on me that day 40 years ago for teasing...lol.there is nothing more disheartening to get to the field and find out that your transmitter is sitting where you left it just inside the garage door where you put things to remind yourself to take to the field,and worse that the field is almost 40 miles away.you just look at your buddies and say OH I'm not gonna fly today cause i forgot to charge my transmitter,and they say i have a quick charger so you whisper to them i left my radio at home,they very LOUDLY say hey guys dippy left his radio at home good for a few laughs.i did purchase a computer radio they make life so much easier...happy flying