My tale of silliness - In a hurry to prepare for my ILS approach at EGTE RWY 26, I dialled in 280' on the CDI and not 260' during my set up (going south along N864 it looked right, especially if you don't look at the numbers to closely). I then sat back on the way to EX and composed myself for the perfect approach that must surely follow (with it's little step downs and quirky localizer intercept) - couldn't work out why after I'd applied drift when established on the localizer it was shooting off to one side. I'd correct it, then apply the drift again and "zooooom" off it went .... (I did this several times - perhaps hoping persistence would pay off??).
Managed to *just* partial that test as I had no idea what I'd done wrong and consequently I was triple checking and questioning every simple thing. Not my best moment, but an important lesson learnt.
Can't be too many people that fudge up their two engined ILS approach, so I suppose that makes me "Special".