Call me silly ive done a few cambelts for my mates valvers and williams. CAn you not get around using renault tools by.....
1) Rotating the engine to TDC, stick a pin in the crank
2) remove auxilary pulley
2) draw a tippex dot on the top of both pulleys on one of the "teeth", and draw a tippex dot on a ttooth on the bottom of the crank pulley.
3) draw a 6 dots on the cambelt, one on a tooth either side of the tippex dots on the 3 pulleys.
4) take belt out, copy tippex dots onto new belt.
5) check, double check and tripple check the number of teeth between marked points on cambelt.
6) put new idlers, tensioner and belt on.
7) Put aux crank pulley on, and tighten. THen put aux belt on e.t.c
Now i appreciate this is not the proper method, and i also appreciate the F4 is all "floating", but if you never undo either of the cam sprocket bolts, them they never lose timing... and if the crank is locked at TDC that never loses its timing.............?