my opinion is that carbys should be taken to a trusted mechanic to be set up, i have never really playe with carby tuning much, but i figure any money spent at the mechanic will be made up in the fuel bill
i have found especially with 32/36 webers they quite often have stuffed diaphrams ect ect (my mechanic advises me this after he fixes them), and that the prob is often not the jetting only, you may save money by jetting it but there is nothing as good as getting the carby rebuilt and having everything refreshed
i am actually a littled diss-apointed in the reliability of the carby, it requires regular tune ups, and diaphram issues even appear in recently rebuilt carbs, also there is an issue with the base plate warping and not sealing properly on the manifold, but that said the price and benefits in power are too hard to ignore for a quick upgrade
in fact all carbs ive had seem to have there fair share of problems, go injection