Tailbeacon and RV9 rudder

[dafast1]

With knowledge of this thread, especially my posts near the end of that thread…

https://vansairforce.net/community/s...ight=uAvionics

I notice that the one-antennae tailbeacon (978 MHz) has smaller dimensions than the tailbeaconX. (28.5 vs 30.48 in height). We know the X won’t fit in the 9 rudder, but can any RV9 owner confirm that this single antennae tailbeacon will fit in a 9 rudder without any modification to the rudder? Pics to confirm?

Additionally, has anyone purchased a used tailbeacon? Is transferring to a new user/aircraft ID a hassle or is it a simple process?
Thanks.