Ah yes that's a good point. I had mapped cursor/mouse to hjkl, but that was causing too much confusion in my brain as it thought it was using vim, found it works better using the default settings. I think that's the problem with tuning a keyboard like this to your perfect use case - it's like tinkering with vim and bash with scripts/addons, and then finding it difficult to work on a machine that doesn't have those things.