Fair redistricting: California

[Idaho Conservative]

1: D+18
2: R+7
3: R+6
4: D+5

This is the ideal map.  since Nevada is basically a 50-50 state (1 senator from each party, only went D by about 2 or 3 points in 2016, state legislature frequently changes hands) it makes sense to have a 2R-2D split of the state.  While on average Nevada might have a 2 point democratic advantage, that is not enough to justify a 3D-1R split of the state, a 2R-2D split is very fair for a state that is about the most competitive in the nation.  with this map it appears there is a safe r, lean r, safe d, and lean d seat.  Probably a 2R-2D split except in wave election years when you could get a 3D-1R or 3R-1D split.

[Idaho Conservative]

Northern California



1. R+9 (Northeast)
2. R+8 (Northwest)
3. R+3 (Eastern Sacramento Suburbs)
4. D+21 (Sacramento)
5. D+22 (Marin to Humboldt)
6. D+17 (Napa Valley)
7. D+24 (Contra Costa)
8. D+4 (N. Central Valley)
9. D+14 (Eastern Alameda)
10. D+39 (Oakland)
11. D+38 (San Francisco)
12. D+26 (San Mateo)
13. D+22 (Southern Alameda)
14. D+27 (San Jose)
15. D+26 (Southern Santa Clara)
16. D+19 (Santa Cruz)
17. R+9 (Eastern CA Mountains)
18. EVEN (Stanislaus/Merced)

Central CA



19. D+22 (Monterrey)
20. D+6 (Fresno)
21. R+9 (Tulare)
22. R+9 (Bakersfield)
23. D+7 (Santa Barbara)
24. D+4 (Ventura)

Los Angeles Area

25. D+17 (N Coastal LA)
26. D+26 (East of 25)
27. D+33 (Coastal LA)
28. D+12 (Lompoc Area)
29. D+39 (South LA)
30. D+40 (Central LA)
31. D+13 (SE LA)
32. D+37 (East of 30)
33. D+26 (East of 32)
34. D+18 (NE Suburban LA)
35. D+24 (N Suburban LA)
36. D+21 (NW Suburban LA)
37. EVEN (N LA County)
38. D+12 (S Coastal LA)
39. R+2 (N Orange County)
40. D+16 (Central OC)
41. R+2 (Center Coast OC)
42. R+7 (Southern OC)
43. D+9 (NW Riverside/S SB )
44. D+8 (SW SB/E LA)
45. D+17 (Outer SB )
46. R+9 (Rural SB )

Southern California
https://snag.gy/GQvDus.jpg

47. R+1 (Western Riverside)
48. R+9 (Northern San Diego/SW Riverside)
49. D+3 (Central SD Coast)
50. D+17 (San Diego Downtown)
51. D+16 (S Coastal SD)
52. R+8 (Eastern SD County)
53. D+7 (Imperial/E Riverside)

as a former Californian I have a few points on your mostly good map.  however:
1. El Dorado County should be kept whole.
2. Combine Northern and Eastern San Joaquin County  with the Eastern Sac county suburbs like Orangevale
3. in SoCal make a CD as follows: Camarillo, Thousand Oaks, Moorpark, Simi Valley, unincorporated N. Ventura County, Santa Clarita, and the western parts of the Antelope valley (like quartz Hill)