Hi TDW,
Find the nodes, I mean, bones,

and changed itīs Y axis position, save the new corrected file (Conning_7C_01.GR2), started the game ...and CTD when trying to open a mission that uses that tower!
Tried again, just openning the file and saveing it without change anything, ctd again.
An info: when i open the file (Conning_7C_01.GR2) GR2 Editor says this:

Shot at 2012-03-12
If i click in NO it donīt opens the file. If I clik on Yes, it corrected the header and opens the file, but then, as exposed above, itīs ctd when the game try to load the file.