Hello I want to comment on th jp +12. The +12 piston does not fit in the eagle however, the piston,rod fit. The collar on the eagle sleeve is wider thus it was designed for the eagle. The crankshafts have different timing. The jp +12 has more bottom and mid range while the eagle has more topend and a smoother powerband. You can also look into getting a murnan modified +12 piston&sleeve. save your money and get the first line p3l it has more bottomend and it gets better runtime. The eagle is faster its your choice.