kilbraur:
After do the calculate for slope I take away 33% for down but only 25% for going up. It work for me.
I work on similar figures but downhill varies to how much downhill the putt is. I can allow for 50%.
If the OP is talking about Merion - yes uphill putts seem to be virtually the pace of very fast greens but still with the break of tourney speed greens. Work in progress there for me!