Not being from the US I'm perhaps not in tune with your problem, but have you considered the heat given off in the exothermic reaction of quicklime and water as being the source of your problem?
I work for a contractor in the UK who has recently purchased Terramodel+Blade Pro on a CAT D5. Results are excellent and we are now extending the software back into our engineering and estimating operations. Is there anyone out there who would share their experience of Terramodel and how it is...