Was searching a certain large auction site and came across a company that claims to put together custom jet kits.

They called it a '6 Sigma Custom Carburetor Carb Stage 1-3 Jet Kit' and say it includes pretty much everything for setting up the carbs for the modifications you have etc.

They are also quite cheap. Does anyone have any experience with these?

Not after anything specific, just interested to see if anyone have used them.