I am re-visiting JLP's Kangaroo program and have a few questions.

The docs mention that the work files should be merged for server/client mode when there are multiple (disconnected) servers. If I am running only 1 server with 2 clients, I do not need to merge the 2 client work files, is that correct (the server will collect the work from both clients and check for collisions)?

The docs also mention the following "To build such an architecture, the total number of kangaroo running in parallel must be know at the starting time to estimate the DP overhead. It is not recommended to add or remove clients during running time, the number of kangaroo must be constant.". How important is this and how does it apply (adding clients to server or adding GPU to client)? Simply - do I need to wait until all equipment is ready or can I add GPUs slowly over time?