at the bottom of the page you linked it says this
This product is good for Display or Super Slow Speed driving.
Not good for R/C car racing.
but I'm also thinking so far those abc mounts are the closest thing to a decent fit I'll be able to get for my shell as it doesn't matter how wide the posts are apart and I can turn them around away from the light buckets and lower the shell a bit more
maybe I should have gone with the pandora Sileighty shell for the length of the nose?