Glad you got the issue resolved.
All the characters in my Saim Hann army are Jetbike 40K conversions. It helps that 40K Guardians suck so volunteers to have their back sections cut off aren't so hard to find. I used the extra conversion with the spear for all of CAL001's shinning spear characters, or my shining spear characters, someones shinning spear characters anyway, I made them and photographed them at the very least anyway.
Saim Hann Version is shown on the bottom left

Also see central shining spear. Same easy conversion with a bit of paper clip glued on the frount for ultra detailing! (the two to a base ones are normal ones).

Who could tell the difference appart from the slight difference in shape of the jet bikes "wings". The converted ones actually look slightly cooler. I am pretty sure that the "real" shining spears spears pretty much just looked like a piece of paper clip glued on anyway. The main difference would be the head and the little wingy things on the side of it present on the "real" version. But your bound to go blind trying to spot that kind of detail anyway (he says on a forum where people paint chapter symbols in 6mm).