After ordering all the components I assembled them and tested. My initial nozzle design threw the LPG in a large vertical poof, however I wanted more "volume" for inside the lotus, rather than sheer throw, so I crafted a new nozzle to aspirate the propane more inside the flower.
Once I hooked everything up this worked as expected.
In the future I plan to increase the size of the accumulator. The small one I purchased is essentially pointless, as LPG flows from the source tank through the accumulator as quickly as the accumulator discharges/recharges. I.e. there is no "poof" from the accumulator, it's all fuel source, so I get a frozen source tank rather quickly.