DarZeelon:
As to the fuel pressure issue with the Dynamix; the manual does state exhaust pressure can be used, however, experience of people that used this carburettor with the Webra #1024 and #1030F was that with exhaust pressure, you have no chance to land with the engine running...
My experience with Dynamix carburator in Webra T-4 works very well without fuel pressure either it is a pump or muffler pressure.
If in doubt, i can take a movie of the engine running without fuelpressure and add in the youtube next time i get "negative" answer..