During my early career in video Broadcast, the modulator (using MC 1495 Ic's) card used this method. The technique was to twist some Kynar wire together and then cut it down to reduce the capacitance until the vectors were in the boxes.
Problem was when you tried to neaten up the arrangement and secure it the capacitance often changed. Depending on which way it went, you might have to de solder the Kynar and start all over again....... Then you used to go off for a tea break and come back to find everything out of spec - happy days - not
