As far as I can work out from the Service Manual there are 3 tightening stages:
1) Tighten to 29Nm (3.0 kgf.cm)
2) Tighten each bolt by a further 90-105 degrees
3) Tighten each bolt again by a further 90-105 degrees
However I haven't done the job, so you might be best to wait until someone who has comes along & confirms the procedure
