I had the same problem ages ago, what I did was-
Got 18" breaking bar with a 8mm hex driver in and tightened it up as tight as possible by hand, then put the pedal at 9 and the bar at 3 and then stood on both. I never had any reason to remove them before I sold the bike and they didn't come undone in the year after I did this.
Ah, right, cheers. Have a breaker and a big 1/2" drive socket with that hex. Was a bit nervous about overdoing things as I'm a right lump, but I'll give this a go.
Might be over to the 'Uve bin Indra'd' thread later.
I had the same problem ages ago, what I did was-
Got 18" breaking bar with a 8mm hex driver in and tightened it up as tight as possible by hand, then put the pedal at 9 and the bar at 3 and then stood on both. I never had any reason to remove them before I sold the bike and they didn't come undone in the year after I did this.