Yeah, it's those washers I need. I quite often take my pedals off to transport the bike or to put on my road bike (I use flat pedals and they stick out a fair bit when you are putting the bike in the back of the car). I don't do them up too tight, just nicely snug (not really an accurate guage I know) but I think more modern cranks seem to suffer from the chewing up problem more.
I want to put them on this time as I can feel, occasionally, as if the pedal axle is bent. I used to get this all the time riding street BMX and you can easily feel the problem, but am I suspecting is because the pedals are not meeting the crankarm squarely.
DezB, I'll send you a mail, you're a star.