Line of sight (multiple nodes)...better tools?

Righty ho…I’ve placed 2 of my mk2 repeaters out on t’ hills and I’m looking for the best coverage using line of sight tools for the next 2. BUT…its a pain in the arse, most tools only allow one location at a time. It would be an absolute godsend if I knew there was a tool out there that I could place multiple nodes on a map and see the total coverage, or at the very least move a node and quickly ascertain (I know it may take a few seconds) the change. At the moment I’ve multiple tabs open and may have to go to the shops for beer and resign myself to an evening of it