[john walker's workshop]

if the cross-section was oval that would be better. they're 2mm round, so 3mm on the widest part of the oval would allow more crush. for now, i used two 0-rings on each side, a blue one on the inside and a green one on top of it. should be good now. chalk off 2 wasted days. oh well, it's a drop in a bucket of your lifetime. apparently there's a factory bulletin on this.