Make sure you put in Van's for the manufacturer ..... program is not particularly intuitive!I use RV6 and it works. ICAO says RV7 works also. http://www.icao.int/anb/ais/8643/index.cfm
Nothing wrong with HXB but they are probably going to ask you about the type then.
I don't want to hi-jack this thread but I am curious. I am sometimes asked make & model when using flight following, sometimes after being passed off. Why do they ask? I always say "Vans RV-7" and they seem happy with that. What gives? Thanks.
They probably want to know how fast you can go.