sorry Al, i have not read your build but why the Q was it a second hand shell or to many second hand bits?
in short i used a standard mini donor car registered as a normal mini. then with the zcars kit installed altered the records with the DVLA to match the engine code and size. they must have done a spot check and got me to take it to the DVLA for inspection. there they determined that there wasnt enough mini left to call it a mini let alone keep its orig identity. by this point i had spend far more than i wanted, so buying a new shell to make the car "new" to the DVLA was out of the question. because i had the orig shell they saw that and the engine as second hand so they wouldn't allow anything other than a Q reg after an IVA test.