Fabulous wisdom - thanks Mike.
You say
“Max Features per image = 80000 - 120000 (This is important if you are using low in image overlap but this has a big impact on RAM requirements, 32GB of RAM will be required if you are using 80k and have 2000 images”
It may not be necessary to set Max Features per image (and Max Features perMpx) so high - or alternatively may need to be even higher. See
https://support.capturingreality.com/hc/en-us/community/posts/115003012052-Optimising-Alignment