This could be a universal fix.

The receiver inlet simply empties into the cylinder.
The outlet is connected to a tube that goes down the cylinder, usually 3/4 of the way and picks up liquid from the bottom of the cylinder.
This way you pick up liquid with out gas bubbles and this is feed to the expansion valve.
Expansion valves do not like gas bubbles it makes the operate erratically.
There is usually a sight glass on the out side of the receiver. When the bubbles go away the receiver is full and the system is balanced.
Under filled and the system "Hunts", meaning the valve opens to far and then stays closed for to long and the evaporator is never filled efficiently.

As far as Maxi-Frig, I've never heard of it.
But I do have experience with propane refrigerant.

The cryogenic units in hospitals use pure propane as a refrigerant. But they use one unit piggy-backed to cool the cryogenic unit. And in the early years of refrigeration propane was used as a refrigerant, but from what I understand some leaks were disaster our.
But I don't believe in a automobile that it would be much of a problem. I'd like to see the pressure chart for Maxi-Frig