Folder Gluer

My first job on a new folder gluer.
Rolam GS 800
I have job setup okay and folding but trouble with feeding as job quite small in centre.
60 mm in centre .It twist so easy in feeder.
Using 2 stops at feeder postions marked in red.
Tried positions 1 but will not feed continuously straight.
What position would an experienced operator set the blades on the feeder.
The job measures 330mm across and 60mm at smallest spot .
Check photo.
Although experienced with case note folder/ gluers I am totally new to this type of folding.
Any tips appreciated.
Thank you in advanced