Very Nice Rosie!
I know exactly what you mean about the growths growing at the back of the mount and not being able to lie it flat
- I have that problem which I 'resolved' with sinking the wooden mounts into pots filled with terracotta pebbles. (Leca) so they stay straight and upright and don't fall over.
As you have mentioned these grow & grow....
My news is...
I haven't had any flowers on mine either.
I have had the 2 mounts (original plant split) in a SW window all year and put one of them in a South facing window since August They also have now been put into Terrariums where they get much more humidity & I don't have to water them everyday anymore...
I'm still trying with this plant.. Been 2 years now & no sign of flowers.
In the hope that one would flower....
I havent been home much the past week I'll put them side by side to see if there is any difference.