@Roth - That's why I said, "In the absence of a Pipnet Reamer, I agree entirely." :wink:
@Vlodko, as far as I can tell, the Pipnet Reamer is of a sturdier material which, over time and use, will not wear down like the Castleford reamer does. The problem area for the Castleford reamer IMHO is that the base of the T handle wears down at the corners and effectively becomes stripped, meaning misalignment with the reamer heads/bits and slipping.
I use a Castleford because I did not have access to a Pipnet reamer when I was making my purchase. I prefer the Castleford to a Klean Ream or Senior Reamer, but will scour the web to find a Pipnet reamer for my next purchase.
Here is a great essay on some of the leading reamers. From Steve Laug's Reborn Pipes Blog: http://rebornpipes.wordpress.com/2012/05/31/my-choices-in-pipe-reamers-a-review-6/
I hope that helps.
-- Pat