Stosh,
The scope I have on a G11G is a C925 EdgeHD topped with an 80mm guidescope, plus focuser, filter wheel, camera, dew shield, dew heaters, etc. (The accessories add up fast :). I use 21, 11 and 7 weights all together, heaviest on the bottom, with about 6 inches of shaft remaining. This combo of weights gives me a lot of flexibility for changing out to smaller rigs. For yours, you may wish to get 2 more 11 pound weights for the increased payload. It's better to use more weight higher up, than less weight at the end of the shaft due to the moment arm torque factor, which you can research. Plus with smaller weights you can more easily fine tune balance than with bigger ones that require more fiddling with exact placement.
Good luck,
John