Originally Posted by
StanSeven
It's not the gauge of steel. Waterford designed their frames from many years ago with the 27.4 seat post.
I would take a real close look at the lug. You might want to consider a shim.
I would just use the correct size seatpost.
Kalloy makes a cheapie in silver for less than $20 that works fine.
On a nice frame like a Waterford I'd likely go for a Thomson Elite, which is a very nice post.