Evohome underfloor HCC80R, more than three actuators in single zone

Hello,

hopefully my post will not be considered duplicated - I was trying to find the answer around but seem to be first having this issue.

my underfloor heating has 5 heating "loops/heating circuits" in one large living room.

apologies my non professional language - by "loop" i mean the pipe going under the floor controlled by single actuator MT4.

so:
- evohome evotouch +
- have 5 circuits, each controlled by separated MT4 actuator
- three actuators connected to HCC80R controller as of now
- also several rooms upstairs, with rads controlled by HR92 - hence evotouch.

issue is - there is a limit of maximum three actuators connected wired to single zone in HCC80R
how can I wire other two actuators to the same zone in underfloor controller?

Some ideas I have:
- define second room in evotouch unit + second temp sensor, bind to second zone in HCC80R with other two actuators wired,
- wire some relay to HCC80 output with all 5 actuators driven by relay
- have two zones from HCC80 bound somehow(?) to the same room in evotouch?

third seems to most convenient - but - is it possible to do


thanks, Prem