Don't have the blm head for pup, but tested every other head with all frames and the only noticed 2 things, 1 was the Stormwaker/Soulsoother heads there's a thin black line that flickers in the middle of their tassel, although that may be something on my end, and might even me something the original model does, as I don't normally look that closely. Did happen with any frame they were on thoughThe 2nd was the Stormwaker frame has a tiny floating dot near its hands, which appears to be present with each headI think they all look amazing though, great job and thank you for your work here! I've been installing just about everything here for a while and really enjoy the work people are putting in!