Thanks @BILL S, it was less unpleasant than feared. Not over 8% anywhere I think, meaning I could keep spinning at 100 RPM avg. Average heartrate of 155 BPM confirms that as I don’t usually go that high on climbs. Having a rest day on Friday’s these last 2 months helps too.
Hope to see some more human riders next week!
Yes, not that unpleasant really so I did it twice. Your speed helped motivate me to beat my first time by over a minute so happy with that. And I had already guessed that you've been getting some rest lately hence your improved performance.