I have a random helmet I got in a trade and I have no idea what the make of the helmet is. I've had Bobafiend look at it too and we're both not sure who made it. the person I got it from couldn't remember either. so, either way, I need to replace the RF stalk and topper to make it correct. it's just a plastic version right now. inside the helmet is just a nut and bolt holding it on. no other markings anywhere on the helmet except for a small dental file on the key slot which appears to be correct. it's a mystery helmet alright. it's larger than the FP budget helmet from ASOK...if that helps figure out how large of an RF I need. thanks in advance, Bert