[DCP-o-matic] Use stable encode server with test version of DCP-o-matic

Hi all. This question is probably mostly for Carl, but thought I'd post it here in case answer is of use to anyone else. We use a setup with one "master" DCP-o-matic instance and other machines on network running the Encode Server. We mostly use 2.14.x but occasionally need to use the 2.15.x test version for some strnage cases which require extra features only available in DCP-o-matic test version. Is the 2.15.x test version of DOM compatible with 2.14.x Encode Servers? i.e. if we want to encode a DCP using the test version, do we need to also switch to 2.15.x Encode Servers during that encode, or will stable branch 2.14.x Encode Servers play nicely with a master running 2.15.x? I'm less concerned about whether 2.15.x will use the power of the 2.14.x Encode Servers, than whether there's any chance of an incompatibility between 2.14.x and 2.15.x master and encoders causing glitches in the encode. Hope you can help. Many thanks, Jim