Quote Originally Posted by T 20 View Post
Now I wouldn't bother with the adaptor on the leather sealed piston to convert to a synthetic seal for three good reasons.

1) John Knibbs is knocking out synthetic Pistons complete with seal at £30.

2) The adaptor adds 27grams to an already heavy piston.

3) The adaptor reduces the already short stroke of the leather sealed piston by another 4mm.
Depends. My 35 has an adapter and plastic seal and is consistent at about 220 m/s - plenty for my use.