Thank you for that. Glad that you have the alignments working now! Do you think that you could re-export the NER Tyneside units that you said that you had difficulty aligning earlier using this new technique so that they are correctly aligned? Also, do the LMS third rail units need re-aligning, too, or are they correctly aligned already in the graphic above? Incidentally, to change the text from "text 1" and "text 2", open Render Post Processor as an administrator, click the settings button (underneath the delete button), and type in the text for up to three rows.
As to the class 09, however, I do think that we need to retain the realistic speed limit, or else this class becomes something totally different: the reason for the low speed limit was that the locomotive had a very low powered engine, but was able to haul larger loads by virtue of gearing. If it is allowed to be faster, it becomes, in effect, a much more powerful unit, which would have to be much bigger in reality, but would also be used far more often for non-shunting work than it actually was.
Finally, do you think that you could upload the .blends somewhere? It would be useful to be able, for example, to fill in additional liveries; the .blend files should be considered open source in the same way as the .png files, I think. If you are having trouble finding somewhere to store them, might I suggest that you start your own Github repository for them?