Do you notice a big difference between the 50 and 55?
I think I've got a pair of 64's 50s 70s and if I disassemble my mini A-10, I have three 30s. I haven't been impressed with the output on the 30mm that's free (pictured). As long as this glides well, and is capable of flight it will make my project goals.
What diameter is the fuse With the 50s?