You may not find the vintage ASC quite as good as you hoped. There is slight play in the workings and by the time this is multiplied to the end of the cranks it can be about one centimetre of play either way. This can be a bit unsettling if you are used to S S fixed. Rather like riding with a very slack chain. It is also possible to find a neutral between the gears. The ASC needs the correct trigger but the FC trigger can be adapted. Other triggers will not work.
You may not find the vintage ASC quite as good as you hoped. There is slight play in the workings and by the time this is multiplied to the end of the cranks it can be about one centimetre of play either way. This can be a bit unsettling if you are used to S S fixed. Rather like riding with a very slack chain. It is also possible to find a neutral between the gears. The ASC needs the correct trigger but the FC trigger can be adapted. Other triggers will not work.