[link=http://www.rcuniverse.com/forum/fb.asp?m=6903156]Here's[/link] an alternate rotor core/rotor head setup from BPHobbies that you might want to consider. The rotor core is plastic but doesn't have the v-notch like the Falcon one so it looks like it "might" be sturdier. I have this assembly and am going to try it when I do my rebuild in the next day or so. It will obviously take a number of flights/crashes before I'll have an opinion on how it compares with the stock setup.

I'd also replace that rotor head......you wouldn't want to have a blade come flying off in flight. It happened to a guy on the Walkera #4 forum (don't remember if it actually hit him but I know that fortunately he was not injured).

Bill

Edited 1/26/2008 - Please note for the BPHobbies parts, in addition to buying the rotor core, rotor core ring, and rotor head (blade holder), you also need to buy the control links (the equivalent of the short tie bars on the F40). The ball links on the BP rotor head and square rotor ring are larger than on the F40 so the stock tie bars won't fit.