Thank you!
I managed to get a really good price for a Tacx Blue Matic (T2650), one of the really basic options for a turbo trainer. The resistance is just like having an extra 10 gears - Zwift do recommend to keep it at level 3 as it gives the most accurate watts. It's not synced with Zwift per say but obviously increasing the resistance means you have to push more power through the pedals, so you can have higher watts at higher resistance levels. I think the more expensive trainers have dynamic systems to match the resistance to the gradient you're riding.
I used Steem Keychain, seemed completely fine on my end.
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