seems pretty complex. Why in the world would u want to loosen the sprockets. Even the manual says to just lock the cams on each side of the block. The one end has the tool u mentioned but the sprockets themselves wont really spin (the intake anyways). Just make sure u mark where the exhaust was and u dont have to loosen the sprockets, ive serviced my timing belt quite a bit due to the offcenter problem which actually may just be my imagination since ur belt looks the exact same as mine.
I would say loosening the sprockets can cause u more problems.
Good luck
