Thanks for the reply. and sorry to bother you.
I have tried using the CAD files to no avail (I am using SolidWorks2015 premium BTW). I can get the parasolid file to import, but since it is a large assembly, there are broken faces in the import diagnostics, and there are overlapping solids reported (improper mates perhaps, but dunno), any feature recognition, let alone editing, does not work. The files appear to be unusable (to me at least) for editing purposes as they all break, so if there is another way (individual part STEP or parasolid files perhaps?) it would be greatly appreciated.
I am eager to get started and congratulate you on a functional design.