Corridor project overlap feedback

I am preparing to fly a 20+ mile road corridor which will be done with overlapping flights.  I will be flying at 400-500’ AGL with a Phantom 4. Most of the flights will use the Linear Mission mode of MME and I will also use the Terrain Aware feature for all flights. Most flights will be about 2 miles long. I plan to set a lot of GCP’s with 3 GCP’s inside each overlap areas. I am thinking a 500’ overlap of the flights should be the right amount.   Anyone have some feedback about the that?

I would not normally overlap that much on such a project. I overlap by 20 metres or 60 feet in old money. Never have a problem and always have lots of key point matches etc.