Cheers Obi, have used the filters. Haven't checked the total number of sites. From what I remember, this guy relogged around 16 times for one unlock, no way am I doing that Now if it's a case of I can visit 16 sites over the next few months, all good. Do you have to visit specific sites for certain upgrades?
Tbh not sure why I am bothering, just curious after the new site was found.
Not needed at all, not since they made the blueprints single pick up instead of multiple. It's possible the video was from that era.
If you fly from site to site, gathering materials from each, and getting the module/weapon/vessel data each time, by the time you have enough module/weapon/vessel data for them all, you will likely have enough of everything else.
The only exception to this, is obelisk data... (epsilon especially)
When they fixed the problem with the blueprint data, they neglected to fix this. It's not used for loads of things though.
But, yeah, just go from site to site, you'll have enough stuff if you are as you say, not in a rush.
EDIT: -
Remember to scan active obelisks whenever possible - and if you end up at some ruins instead of a structure, scan those too, for more obelisk data.