I am installing a retaining wall (Belgard blocks) and of course on a curved wall the top cap stones don't fit flush to each other on the curvy part...Isn't there a simple way to miter/anglecut the flat caps so they fit with no visible gap? I thought you like placed them and measured the largest gap between the 2 and cut that amount off each cap, thus a perfect mitered fit....Is that correct, or is there an easier way?
Thanks for any simple answers!!

The basic wall from the top view ...

For the start at one end of the wall, if the end of the cap will be seen you will want to do a broken finish with the same overhang that will be on the wall face.

Once this is done, lay the block into position as shown below.

On the underside of the block mark at the front intersection of the wall block and also at the back at the half way point of the gap (blue spots). Remove the cap, using the marks scribe the line shown in green and saw the block.

Set the finished cap back into position on the wall. Set a piece of cap block where the next one goes to act as a spacer as shown below.

Set the cap to be cut on top of the spacer so that it overlaps above the last block cut as shown below.

On the underside, mark the cap at front and back to match the previous cut block (blue spots). Remove the cap, scribe the green line between the marks and cut. Set the block back on the wall and return to the appropriate step above to cut the other end.