Pascal,
I think he means this, you need to dl tdw's GR2 Editor
You have to set paths to sh5 folder in two options
Then dig around and find the Conning_7C_0X.GR2 file/s
Locate Conning_7C_01.GR2 file, find cfg number O02 e 03 (whatever that is, i'm still getting to grips with the editor but it's fun to learn and darn easy me thinks)
Alter height for a guess (obviously i hope) and save, and voila
If you do start to mess, make sure you backup (as always)
As said, i have had nothing like you're experiencing either