Tail bumper missing

[Huibrecht]

A minor issue, but in v2 the tail bumper seems to be missing.
On 146 series -100 and -200 a tail bumper was fitted.
Series -300 had no tail bumper anymore.
And all Avro series had no bumper neither.

Nevertheless a wonderful update, compliments to the development team !

[Martyn]

@Huibrecht Thanks for reporting this issue. We'll get that fixed.