three years of having the DGX valves and isolator. and no problems*.
* - the "low profile" valves gave my LDS fits, and he actually ruined them as there was no flat at the base of the neck to put a wrench on for removal (vip), and he then destroyed the valve (and promptly purchased me a replacement) by wrenching on the valve head. The tall profile have this if you desire. The tall valves are also easier on the hands to carry.
I find that the quick smack with the heel of my hand has been more than adequate for seating and un-seating the valves for the last 26 years I have been doing this....
YMMV
* - the "low profile" valves gave my LDS fits, and he actually ruined them as there was no flat at the base of the neck to put a wrench on for removal (vip), and he then destroyed the valve (and promptly purchased me a replacement) by wrenching on the valve head. The tall profile have this if you desire. The tall valves are also easier on the hands to carry.
I find that the quick smack with the heel of my hand has been more than adequate for seating and un-seating the valves for the last 26 years I have been doing this....
YMMV