i have set up many planes with the filling valves and had problems with some of them i have used,i have several in my flight box still that i removed.i have seen some people use them and never had one days problems.they are a neat way of filling a model,i was at the mindset that since something cost'ed more it would be an improvement but that is not always the case.whatever works for you is what you will use.i would never intend to make insults and haven't so far taken anything that was said on these posts as an insult,RC Universe is like one big library,when we all put our minds to it we can figure out any problem or suggest and help one another.i was a mechanic all my life and there was always someone that had a better idea or easier method of doing something and i am always open to suggestions.it all boils down to preference and personal choice.if someone makes a suggestion here and a new pilot has questions then they should pm or post to have a diagram of what was said.these moderators here do a fine job of helping and guiding people to others than have and can help.