[Umby]

Here's the sequence I think it should be done, but please note the questions along the way and thanks again.
1. Have tarps ready...
2. Tear off gutters and drip edge (carefully for reuse)
3. Remove top two tiers of aluminum siding
4. Cut third tier in half long-wise leaving makeshift tabs to re-secure with nails
5. (or not? I may just install the nailer to this third tier of siding...?)
6. Remove old facia board (or whatever exists) to expose the rafters, pull back insulation inside attic
7. Measure existing rafters for their bird mouth dimensions and create a template
8. Cut and sister-in two new rafter tails to the existing rafters at both ends of the sofit with (say) 2' overhang
9. (Rafter tails inside the attic around 5')
10. Cut and sister-in all of the rest of the rafter tails with a greater than 2' overhang
11. (Use taught string ran between, and on top of, the first and last rafter to align the remaining rafters)
12. (What about old roofing nails keeping me from getting the two rafters to align?)
13. Snap a chalk line fastened between, and on top of, the ends of the first and last rafter tails
14. Plum cut all rafter tails (with my new trim saw!)
15. Push insulation in attic back into place and insert new air dams in between rafters from outside
16. Nail 2x4 (or 2x6) sub-facia accross the rafter ends flush with their bottoms
17. Level measure from bottom of sub-facia to wall at both ends of soffit and mark on wall
18. Snap a chalk line between these two marks
19. Horzontally nail up 2x4 nailers to the wall with their bottom edge flush with the chalk line
20. At every rafter, measure and cut 2x4 lookouts to be toe-nailed to the nailer and nailed to the rafter tails
21. Nail on 1x6 facia board, possibly vinyl, but certaininly painted or treated, to the sub-facia
22. (Carefull placement of the facia to allow for sheathing to clear and overhang a little)
23. Measure, cut and nail-on, plywood sheathing to the tops of the rafter tails
24. (Maybe I should use the entire 4' width of the new piece and cut up 2' into the old roof ???)
25. (How much sheathing should overhang the final facia piece?)
26. Cut and nail on, a plywood triangle to the vertical end of the soffit, cover with piece of siding
27. (What would this piece of siding be called? (It comes down the gable and stops with the original roof))
28. Nail on L-channel facia piece (will this cover the entire facia?)
29. Measure and nail on F-channel to wall, on or just beneath the nailer, horizontally level with the L-channel
30. Measure and cut soffit pieces, snap into place between L and F-channels
31. (Should I bother with a rubber-like ice shield at this point? (I don't have one on the original roof))
32. (I'm sure it's code in southeast MI for a new roof, but this project is just an extension)
33. Tack builders felt onto sheathing
34. Nail on drip edge and shingles
35. Nail up gutters
36. Cut and put in a ridge vent who's square area is equal to, or just less then that of the new soffits' sq. area
37. Drink a cold, cold beer