I'm going to rebuild my Showa forks on my 98 916 to swap over the top tubes which have done the usual oxidising/discolouring. The replacement forks are from a later bike so have a wider spacing on the caliper mounts, so I will combine the original bottom tubes with the replacement top tubes. While doing this I will fit new seals. So my question is which seals shall I use, is there any that are better then others, or are they all much the same?