[khgeisler]

This might be a little spendy, but I found this online that may just be the ticket to reach those tight dually stems. I bought the inflator gauge and locking inflator head from the vendor directly but here are the amazon links.
These get really good reviews from the vendors site. I think Steve Vance would approve!

https://www.amazon.com/dp/B0CJCQ3FKR/?co..._lig_dp_it



https://www.amazon.com/dp/B0CGKJ4VD1/?co..._lig_dp_it

Simon, the locking head might be the ticket since it does not have the 30 degree reverse angle.  I spent hours looking for something like that.  I think Mr Vance would approve.  Good find!!  I will see how mine works,  but I have a feeling this will be added to my bi-weekly Amazon order for the rig.  I may have to join Amazon Prime now.