Instead of following the instruction i decided to follow what appeared to be a good way to make the trailing edge perfectly straigth. The reason was that my trailing edge skins were already a bit weavy and i thought more precision was required.
The idea to have an aluminum angle to cleco the trailing edge to is good, however my use of the squeezer has been less than perfect resulting in a very heavy trailing edge.
Drilled aluminium reference angle with stepdrill to allow 1 inch hole for pneumatic squeezer.
Used pneumatic squeezer with adapted flat die trimmed to angle.
Result not satisfactory as trailing edge presents barely acceptable waves (within recomended tolerance, but very bad look).
DECISION: REORDER COMPONENTS AND REDO THE RUDDER: