Can you get potassium hydroxide and potassium sulfite, as well as p-aminophenol base? If so, an easier way to make it is:
250 ml water.
20 grams p-aminophenol.
100 grams potassium sulfite.
Stir to make a sort of slurry. Add water to make about 400 ml.
Add 13.5 grams of potassium hydroxide slowly while stirring. The solution should clear up. If not, add bits of the hydroxide until it does. Add water to make final volume 500 ml.
The solution will gradually darken. It is said that the original Rodinal was aged for 2 weeks before use. If you can wait that long to try it, you're a better man than I.
Potassium sulfite is very easily oxidized in its powder form to the sulfate, which is not good. If possible, get some of the standard 45% solution and use 222 ml of it.