Is this system proposed to SIXGA? The Grade 3 onwards is an interesting idea. The system should blend in with the current SXIGA rating rather than a new entity of its own.
If not, will be wierd if each club has its own system. (E.g. Bishan Grade 1 vs Kampong Glam Grade 1, rather than Bishan JiaJi vs Kampong Glam JiaJi)