I've been playing with Ortho4XP and finally seem to have gotten results!

This is KRAL (Riverside California). ZL17. About 6GB for +33-118. ZL14 looked horrendous. I will try ZL16 next to see if it is an adequate trade off between size and resolution.

0_1456808621885_Car_Bonanza_20160229215851_33.953855_-117.451773.jpg

The location is:
33.953855 -117.451773