Prince,
I was bored with the LU forum so i migrated to this one,Everyone else seems to do the same thing too.
I was contracting all my corporations back to myself and trying to become selfsupportive.Well my corporations were taking loans out left & Right,and not making profits.
I was asking simular questions in Forums,and getting some goo advice and slowly begain to get it. i Spoke with EO and he helped me to understand.
1) only contract the minimum your common market requires you to contract.
2) If you contract to yourself like the FMU only do so until the shortage lets up some. it will get you thru the hard times.
3) while you contract thru a common market you are not in control of the Quality of the product you buy(example: if you only need 190% quality [and you do] and your FMU corp produces 330%) then you will pay the inflated price for the FMU's on the common market/contract,Thus spending more money for the FMU's and lowering the profits of the corp you contracted the FMU's to.
So if push come to shove and i needed FMU's for a particular corp i would do a direct sale from my FMU corp to the corp i Needed them in and buy only 2-3 monthes worth. this system requires a lot of micro management but it helps the Profits.