The next that you will notice is a funny thing in that in the “research” window by “SMG Infantry” there is a “1” in the “RES” column. Note that over by the button “Modelresearch(0)”, this is set equal to SMG Infantry. This is basically saying the base research for this model is SMG Infantry. This is a default creation setting for all SFTs, but is, of course, wrong. We will now set the research levels for Light Tank.
First, click on the SMG Infantry line and a set of buttons will pop up as shown in the figure.
Click on the “Set Research for Level” button and enter zero. The Model Research will still be “SMG Infantry”, which is wrong. Now, go down to “Light Tank”, click the button, and enter zero. The Modelresearch field will now change to “Light Tank”, which is correct. This sets Light Tank research as the base research needed for this model. For the most part zero is the first element in these arrays. (technically, all the other research should have a -1 in them, as in not applicable). OK, now go down to “Light Tank II”. Click the “Set Research for Level” tab, and enter “1”. Do the same for “Light Tank III” and “Light Tank IV” and enter “2” and “3”, respectively. This now defines the research techs for the first four levels for the model (SFT). If you have more techs for levels, follow this procedure for all the levels. I had you put a zero in the “SMG Infantry” first because I have found that if you first put a zero in for “Light Tank” and then went on to put a “1” for “Light Tank II”, SMG Infantry would have gone to “2”. Then as you added more “Light Tank” techs, the level for SMG would keep increasing. This way, it is eliminated.