So...what maximum LPG is considered to be the best to give you the best control over reading pressure?
Yes, the boxed values represent the working pressures (minimum and maximums) of those particular regulator models.
I would say 200 PSI should be the maximum reading on the low pressure gauge (not the maximum delivery pressure of the regulator). Anything higher, and it will become difficult to see how much you are increasing/decreasing the working pressure by.
I'm so about to throw this reg away...i purchased this VTS 250d on eBay and have been trying to remove the LPG and inlet but its practically impossible. My hands hurt from trying to turn the wrench but no luck. Any suggestions? I do not have a bench vise.