Hi nice to see another Amplifier 2 frame being saved, good luck with the build.
You are correct with the seastpost mine is 26.8mm, though not many of that size around these days, found one on ebay.
I didn't replace any of the bushings as they were not too bad, just cleaned up and greased. I don't think my frame has done much mileage for an oldie. I may have replaced them (preventative maintenance) if I was able to find any, but didn't fancy having a set custom machined.
Is your build going to be an accurate resto or a mongrel like mine. Any intersting parts going on it? I enjoy riding it but if I want proper full sus I use my Giant Anthem. The Mongoose gets lots of comments on the trail though - mostly 'WTF is that!'.
Lets see piccys though!
Mongoose Amplifier II build finished...but evolving
Giant Anthem X4 bought and paid for...now seriously updated
Mongoose Deuce Pro build finished...