First, many thanks for implenting ZWO file import into our TP workout libraries (TPv 0.4.7)!

I mentioned this back in the days of IndieVelo but I'll request it again here.

Xert uses a fairly dynamic concept of Threshold Power that changes according to how well you are performing the training. It can decay as well as increase during a training micro-cycle. When Xert generates ZWO files it enters the user's Threshold Power into the ZWO file as <ftpoverride>ThresholdPowerWATTS</ftpoverride>. Please enable TPv honour this override.