No you dont need a regulator for your now non regulated appliances as they are high pressure. This is the reason for the regulator, to convert "cylinder" high pressure to low pressure for fridges and marine stoves and any other low pressure appliance.
The type of fitting, whether it be Pol, 3/8 LH or Primus type, has no bearing on cylinder pressure as they are all the same. If you want to rationalise to Pol, all you may need is an adaptor to adapt to your current uses.
Numpty
Thomas - 1955 Series 1 107" Truck Cab
Leon - 1957 Series 1 88" Soft Top
Lewis - 1963 Series 11A ex Mil Gunbuggy
Teddy5 - 2001 Ex Telstra Big Cab Td5
Betsy - 1963 Series 11A ex Mil GS
REMLR No 143
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