Yes thanks! I think he have flater core than yours and thats why he can pull it so far. It works like a "hornbow" just without horn. Thats what ammazed me.
Schould make one from the pics but, better this way. First ask the correct size make it and brake it lol.
Carve out the first core but have to make another because there are weak points ( hoped will fall out but not ) and this bow working on limit so weak points are not tolerated. Some work into the trash, may for the kids with some backing.....