Looking to purchase an INNOVA SDS PRO scanner. Unfortunately INNOVA markets the three versions of the 7111 the same. Apparently they use the same SKU & Part number for all three units. The standard 7111 and 7111 SDS offer 34 function tests. The PRO offers 44 function tests. Neither the standard 7111 or the 7111 SDS can be updated to the PRO. Different hardware and firmware. Has anyone actually purchased or used the 44 function 7111 SDS PRO. I found one on Ebay a few days ago but unfortunately made an offer based on prices of the models, 7111 and 7111 SDS, before I did my research and found out the neither the 7111 and 7111 SDS were upgradeable.