Hi Everyone,
Just thought I'd chime in and suggest if anyone is looking at a new hydraulic piston/lift for the seat of the Silverwing, I bought one over on Aliexpress for $10 that does the job quite nicely. Just thought it could be useful for somebody. Just make sure to choose the 100N one as it's for about 20Lbs pressure and will work well. Depending on when you see this post, the link may no longer work or the item may be out of stock, but it may help you look for similar ones, especially the length (280mm). I had to slight file the holes so the original brass washers fit inside. Honda sells these at around $50, so if this helps, that's great.
Stefano
https://www.aliexpress.com/item/4000203045857.html?spm=a2g0s.12269583.0.0.6414d1c5JfelbT