Thank you Justin, I'm glad you like the scope
The appearence of the spikes are a direct result of the guitar strings that I use for the secondary holder. This makes them long and thin and only visible on the very brightest stars.
I also find it interesting that the only hint of Alnitak is the long spike going across the frame from left to right. There is no visible light from it otherwise, even though it lies just outside the FOV. I attribute this to the Royce mirror's high precision surface which in theory should increase contrast. It seems like it does, although I only have this one image to analyse so far.