What difference is there between the Parkzone J-3 Cub and the Parkzone J-3 Cub BL - if any? In my 3rd flight I took a nose dive 10 ft, coming about into the wind to land, and cracked the cowl and broke the prop. Went to the Parkzone site, got the part number for a new prop, went to lhs, obtained said prop, got home to discover that the part number on-line at the Parkzone site is different from what my manual said (PKZ1001). Went back on-line and noticed an "adapter" so tripped back to lhs and picked up the adapter. got home and noticed the prop is quite different pitch than what came originally. I know improper propping can be an issue, but wonder if the difference between the J3 and J3 BL is enough that I ought not to use the BL part on the standard J3. Make sense?