I did some mock ups of 12 and 18 hole tie blocks. The 12 hole are known for string slippage. I did do some mods to see how that can be resolved, but not sold on my test results just yet. I did mock up some 18 hole samples and tested them. Wow! Makes the 12 hole look like a joke. No slippage what so ever in my mock ups. Very impressed. Might have to start using this design! Standard 6 hole works fine too! 🙂
Fellow luthiers, what are your experience with the 18 hole tie blocks?