seems recently there have been heaps of "clubmaker help-me" threads, for various things. Thought it may be best to just have the one, and then all the answers are in the one spot.

I have one very basic question that I know that has been answered before, but i cant seem to find it again:

I'm looking to increase the SW of my irons. Currently at about D0, but I want them up to about D2/D3.
Is it for every 4g of weight added to the club head, it will add about 1 point of SW approx.? I will get them checked again to make sure, but I don't really want to waste 3 or 4 hours of Tourfits time when i can add the weight on myself to get them close too and then have them checked.