Many thanks for your reply.
I have just upgraded to a yearly subscription so I can have a second free account. So far the only problem that I have encountered with my cunning strategy is that Xert is not letting me load a manual workout on the same day that I do it. Instead it is only offering it as a planned workout. That means that I have to wait for the next day before I can load in the run/cycle/swim workout to the opposite account which is a bit of a pain.
In fairness the time to load in the activity once allowed is very quick as it is just accessing the Xert platform, clicking on the planner to open a manual workout & then copying 4 metrics across. I did try stripping out the power using Fitfiletools.com but the problem is that method is definately time consuming but worse, that Xert then applies an estimated power metric presumably based on HR & an incorrect fitness signature (i.e. a cycle one when you are uploading a run). That means I think that Xert will then analyse that activity’s power & potentially incorrectly update the Fitness Signature. Stripping out HR as well as Power could solve this but then what advantage over creating the manual workout method?
In terms of time/effort I feel that it is worth the small extra effort so as to recognise that Cycle & Run have (sometimes very) different Fitness Signatures & analyse them accordingly. I presume that, with coming from 100% cycling, you are probably a significantly better cyclist than runner at the moment (e.g. high FTP, Peak Power etc) & so the difference for you could be quite marked also.
It might be worth you emailing Xert HQ & asking their opinion as they will be able to see your activities, Fitness Signatures & judge Pros/Cons versus any extra effort for you. They (Ollie) answered a couple of queries from me with a great & relatively easily understood explanation. I do take you point about the time needed to optimise Xert though as it has far more in depth analysis than any other platform that I have used. The Xert blogs & forums are like being transported into a PhD Sports Science course. If you don’t though it seems like you may be missing out on the full benefit that you are paying for both in money & sweat.