I agree! I'm in the process of creating a DEployable Universal Combat Earthmover (DEUCE) and am about 50% finished with the model. This vehicle doesn't really fit in with the OFP time frame as it is just now being deployed to units, but I was able to locate the operators manual and parts book for it, so I have lots of detailed diagrams and pictures for reference.
If this goes well, I will be making other construction oriented models for OFP.
My son loves construction trucks and can't wait till I get this model done!