To continue the spirit of agreeing with one another, I agree with Dave.
So much, in fact, that I used Dave's own sketch of how he raised his backstay split to avoid the very situation he just described.
It's VERY important that you do this.
I used a Garhauer split backstay piece. It's a beautiful chunk of metal with two rollers (wire blocks) inside a nice shiny stainless steel pair of straps. Instead of building a whole bunch of blocks and rings, try the Garhauer. I remember it was all of $56 in 2001.
So much, in fact, that I used Dave's own sketch of how he raised his backstay split to avoid the very situation he just described.
It's VERY important that you do this.
I used a Garhauer split backstay piece. It's a beautiful chunk of metal with two rollers (wire blocks) inside a nice shiny stainless steel pair of straps. Instead of building a whole bunch of blocks and rings, try the Garhauer. I remember it was all of $56 in 2001.