Besides one extra piece of equipment the Snelgrove method also uses another
ingredient - time.  It is very much a method for the small scale, hands on,
beekeeper.  I have used it occasionally in the past and hope to do so again if
I can remember where I left the Board.
I have more success splitting a colony into several by using a variant of Ron
Brown's two queen system, details of which are, I believe, buried within the
vaults of this list.
Chris Slade