I made this abut 20 years ago when I first started quilting but just with a paper pattern, not perspex templates. We used a border fabric for the hexi shapes and also for the centre. However our centre was made up of 8 triangles with the points all lined up on a certain part of the pattern so as to create circles. Hope you understand this, I can't do photos. We did the diamonds in solid colours. Good luck with this and I would love to see the finished block.
Anne