Hi,
I just tried imaging one of these and had the same.
Closer inspection reveals the WMI Vendor Name is the cause....
HP in their infinite wisdom have changed from 'Hewlett-Packard' to 'HP' (wmic csproduct get product)
If you look at your deployment share, you've likely added the new model to a 'Hewlett-Packard' (up until now, every HP product I've ever imaged has used is in here)
Cut/Paste your 'HP EliteDesk 705 G2 SFF' driver folder out of the above folder and in to one named 'HP'