Actually I would NOT necessarily follow this "plan." These were made from as I said "the junk box" and they involve parallelling odd values to make up the total. Much easier to just buy the correct individual resistors. Here is a photo of a test tool that someone has edited in the correct values in yellow
View attachment 1715537911
Those three, for empty, 1/2, and the full mark are all you need. I would get at least 1 watt or larger resistors, as there is some current going through there
