okay, good input folks, I do like jasper & linker's posts re re-shuffling in order to try and get some action post-flop, however, heres the rub for me, 15-20 cards being exposed, gives way too much information to the players remaining in the hand, if we take it as being 18 cards exposed, we can say that the players have gained information asto 38% of the deck (20 cards including their hole cards.) Substantial action has occurred, therefore in some way shape or form this hand has to play out, you can't call a misdeal etc. RROP also gives consideration to the board being as fair and as intact as possible.
Therefore for me, I froze the action pre-flop and then ran the board as it would have been all the way to the river and let the best hand claim the pot. It does go somewhat against the best interests of the tournament as it is possible one of those players would have been eliminated during the hand, but then the best interests of the tournament do not preclude players seeing 38% of the deck in hold'em.
Thanks for the input!
Regards
Stuart