Ok, I just did the belt re-tensioning,
I had upgraded to the 188.8.131.52 firmware(via Android) but I do not have an Apple device to complete with the Wahooligan app.
So my unit is not being controlled by my Quarq.
My spindowns were previously in the 20.5sec range, I removed the plastic cover to see what I was doing.
I did notice the right side of the belt had some rubbing contact and found a few bits of rubber debris but nothing to talk about.
The belt does seem to be biased to stay to the right of the pulleys even though I tried moving it left.
Loosened the 5mm bolt which locks the tensioner and then loosened the tensioner by a few turns to get 24.5 spindown.
It was much looser at this point and coasting difference is very noticeable.
Wattage difference at this point in time was about 15w.
I used a custom workout of 160w interval of a few mins to fine tune, one turn tighter brought it to about 5w
so I did another half turn and it is very close.
Will know how it works tomorrow when I do a proper workout.
I hope this works for me as I do not live in the US and it would be very difficult to get any kind of official support.
It would appear that the belt differences of tension, rubber, aging etc may need to be accounted for in the firmware,
unfortunately the power measuring gauges seem to be after the belt which may make things a little more difficult.
This is similar to how a powertap usually reads a few watts less than a crank based power meter.
Interesting..I haven't got the time to test this out on my kickr, but how is it with the drift now? Mine drifts from about -5 watt until 20 watt over a hard 1 hour workout.
So if I do this, will the kickr then show me very low power at the start, if I set it to give me correct power data at the end?
I can't believe this makes the drift disappear?