I have been trialling bkool with the view to purchasing it. However I find that the pressure of the break becomes too great making easy courses uncomfortable. Anything above 1% can feel like too much force. I have calibrated the device with Tacx software correctly and fitted a trainer tyre. I updated the firmware to the latest version. It would be great to get some advice as bkool have just said "the tacxs trainer works up to 7% gradient"