revigourating apartments KNEKTinstall

Hello All,

Posing this scenario to you in the hope of some advice in bringing upto date my ageing apartment install.
Please forgive me if i dont know exact models but will try to be as descriptive as possible.

Current setup -

Linn Classik - lounge stereo connected to speakers and acting as the KNEKT controller

2 x Knekt room amps
2 x wall rcu
2 x pair in ceiling speakers
(the above providing audio to master bedroom and master bathroom)

This setup is now circa 10 years old and have the following issue and difference in how i prefer to listen -
- Linn Classik has developed a fault where sometimes will not power on.
- My style of music consumption has changed to a point I listen mostly online from my iDevices.

What I would currently plan to do is -
- Upgrade Classik to Movie Classik 05
- Add an Airplay express to each of the knekt amps line in

What i hope this will give me is a reliable master system in the lounge with a slightly uprated experience and most importantly airplay functionality to the remote systems.

My questions are -

Firstly, is my plan sound and the best use of the knekt install to meet my needs.

Secondly, will the classik upgrade and adding the local source to remote rooms be plug and play?
If not, is there any online documentation or even better a service technition based around cardiff, south wales to implement and advise?

Thanks in advance for your help and advice.