Thanx, everyone. Keep the comments coming. 1.I would like to bring things back to the OP idea (I'll even Block the problem in a different manner): Precision looks to Classify hands by "5 Card Majors", "Strong One Club Opening", "Limited Bids" etc. When you follow the Classification System to the end, you are left with a few "Other Hand Types" that fall outside the Scheme. This becomes a "Feature", not a "Bug". With a bid such as "2D", you access a Set of Sequences that return a quite specific description of the problem hand. OK. We all know this. 2. This isn't a matter of "Tinkering". The modern advocacy of the 2C Bid as limited to 6+ Clubs is Systemic for many. Others are not convinced. Remember the quote above from Berkowitz and Manley: If you are OK with 5 Clubs - 4 of a Major, the 2D opening becomes a matter for 4-4-1-4 Responses, a simplified Return on Investment. 3. Within the Scoring System, the Majors are separated from the Minors and the Minors have had separate Treatments (Clubs vs Diamonds) for a long, long time. Would there be advantages to treating Spades and Hearts differently in Precision? One solution would be to have limited use of 4 Card Heart suits as Direct Bids. Kantar wants a Strong 4 Heart opening and, if allowed in a Precision Classification Scheme (Not every 4 Card Heart Suit would apply), would end the necessity of the 2D "Special Bid". It could be replaced with a 2D Flannery Bid and that would appear to be a Perfect Fit in such a System. Asymmetric Majors might be a Good Thing. All I was trying to do was examine an Opening I saw. 4. BTW, I'm not Glen. The link in the first Post was to a very fine article on this idea. Very predictably, I disagree with his Mappings. If there is a weakness at the 16 - 18 HCP 1 Club Opening, then maybe pairing a Strong NT with 1 Club would solve the problem. Balanced Hands would open 1 NT, hands with Singletons would Bid 1 Club. Just a thought. 5. Finally, Attn: Spotlight7: Tell me about Montgomery. His Revision Precision intrigues me, therefore he intrigues me. Thanx, all, CW