OK, I seemed to have solved my issues. The auto targeting still isn't working but I got the Satellite Uplink mod. At first I thought it didn't work either, I even launched another satellite in case it required it... eventually I sought out and read the instructions.... 'Enter the building'
The Satellite Up-link mod allows me to scroll the screen while I have access to deconstruction planners, blueprints, and for my purposes (so far), an ion cannon targeting device. Death from Above
The map, as you can see, has a relatively large clear space around me. With only a few ion cannons the biter migration seemed to be encroaching faster than I could kill them, now, with 8 ion cannons and counting, I am definitely knocking them back. There's huge fields of alien goop and crispy tree stumps out there.
I love this Factorissimo base it is so efficient. The distances for robot travel are so short 200 robots and two roboports are mostly unemployed while keeping both me and the base happy. Rockets are popping out ~ three per hour if I remember to launch them. Will think about automating with ion cannon insert if it can be done.
Now I'm thinking about making the modular Factorissimo bases to expand with - that make rockets/ion cannons only. A supply train with everything required for building said modular base. Also the raw requirements, and the designs and then blueprints to make the whole process simple. Then I'll retrofit this base to fill expansion supply trains as this is now home. The early sprawl can continue to make modules and do research till the research is finished and the expansion designs/retrofit of the new home are finished.
My only issue is too much plastic slowing rocket fuel. The extra petroleum -> plastic taken from the rocket fuel facility needs to be made into solid fuel too. One day I'll learn how combinators work, but not today