If you do that it will fly but it will have a big delay on the swash. I did it once just to see but I hover and notice that I was putting to much stick input to try to haver and it was a hard to control put it down and got me a FBL head.
I when thru all the setting and put a set of mah 710 and start a hover but I did not like it since now was very sensitive all around. Then I got me a set if FAI/F3C blades 720 weight on this blades are around 225g each they did really fly awesome. At that point I was able to start flying around and got used to the née feeling after all that I am able to fly it doing loops rolls hold it inverted tic tocs and autorotations.
Just removing the flybar will not really give you the feeling of FBL. You have to set up the Heli with a FBL head of your choice. The most important thing is to set everything right I have to learn everything with no help since I start with the gasser and no one at the place I used to go fly have one. Then I did the Rex but again everybody that fly with me call me crazy but some of them did try mine and notice not much differece but faster response on ciclic etc.
Any my friend if you want to try well like Nike state...just do it
hope this help!!
Suzi Janis 800e & 700e 3blade both w/Ikon