David, I installed spikes in my GKs, but didn't need to tap them - can't recall the bit size I used. I do know that the first hole was slightly too big (maybe what happened to you?) I went down a size, and they all went in fine, and I haven't lost a spike in over a year. IIRC, I used a small metric socket to drive them home.
They work great - esp. in the wet. Alex -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To post to this group, send email to rbw-owners-bu...@googlegroups.com. To unsubscribe from this group, send email to rbw-owners-bunch+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.