vailllant eco-therm pro 937 vr33 and evohome opentherm

Hi everyone
I have tried looking around and cant find 100% acurate instructions on what i need to do what needs bridging what doesnt etc

i have only just bought all the kit so havent tried anything yet

but what i gather is

1. install vr33
2. connect x32 to x31
3. connect cable that was connected to x31 to the other connector on the vr33
4. disconnect 230v control
5. bridge the + and - for 230 and 24V control
6. wire the r8810 to the T0 terminals on the vr33

do i need to do anything else how can i tell if its all working?

many thanks for any help you can give!