I don’t “know” one way or another...... but I was under the impression the older Hughes cams were done by Engle(and this appears to be common knowledge).
And they are now done by Howards(also seems that be common knowledge).
You’re saying there was some point in between Engle and Howard’s where the Hughes cams were from Bullet?
Looking at the Bullet master list, I don’t see anything that matches up with the specs in that article.