I have never used Oyster-bucket panniers, but I did build my own set from Pickle Buckets. They worked well for daily use, you can't tear them. I have seen the Oyster-bucket panniers and there mounting system is good.
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Bentbaggerlen
"When the spirits are low, when the day appears dark, when work becomes monotonous, when hope hardly seems worth having, just mount a bicycle and go out for a spin down the road, without thought on anything but the ride you are taking." - Arthur Conan Doyle