Mercedes Sprinter dually tire pressure

Thanks for all the advice....it is greatly appreciated! I have ordered a full set of 6 metal valves from Bill @duallyvalves.com and have a local tire shop who says they do work on Rvs all the time and will charge ten dollars a wheel to change out the stems! So this anal fixation of mine to be able to easily check my tire pressures will cost me about $200, but money well spent IMO if it works? I also ordered the flow thru caps to get out a little further beyond the damned wheel covers! Lol My only remaining concern is that Bill told me that some bending of the stems might be necessary? Well I guess time will tell if my local shop is up to it? Snoop