How to use SingalStart in CaseMap

Hi ivyteam

I'm using ivy 7.0.1 and I have the process like this:

My project has two stage, First stage is Data Gathering, Second is Document. In each stage i have a ivy process (could be more in real case), and they are connected by signal (see on picture)

When first process is done, it send signal then second process is started and create task to responsible role, If that activator open task, process can continue with another signal to create another task and so on...

When i use ivy 7, i try with CaseMap, but i can not integrate those process to case map, because i see it only support for Start Process. In this picture i only can browse first startlink, not signal or second task switch.

My question is:

• Can i apply CaseMap for my project (it use a lot of signal like this pattern)? Or we need to remove all signal and change to startlink? I see we no need to use signal and task switch. how to handle signal boundary event on startlink?
• In case we only use startlink, how to secure them?

Thanks