Guess i could update on a situation i mentioned earlier in this thread, that it seemed impossible to fasten a regular round rail seat on it. Seems i got the wrong inserts as well, even though they were branded as 7x7 they would only take an oval rail 7x9 seat, which sat nicely.
Been using it on my road bike at the tail end of the season, got around 200km on it, it looks nice and is fairly comfortable. Can't say i felt any vibration dampening and i wouldn't expect too much of that anyway. Mainly roads and has seen some rough asphalt, it's a new build so still getting settled and getting to know the bike.