One of the scariest moments I've had would have been watching the fuel pressure slowly trickle down after swapping tanks just after take off from Goulburn.
I have read this thread with increasing frustration and agree with all who state that the POH and FM are the correct sources for this information.
BUT what astounds me about the above comment is why on earth would you want to even think about changing tanks "just after takeoff" - unless of course you were suffering a possible fuel related engine problem - but Polymer's post does not indicate this.
I'm not trying to be a smart ass here but this thread does suggest some pretty poor training or at least comprehension of basic airmanship and tech knowledge.
Indianzz