It is a lot more than just cutting a hose to length and shoving a barbed fitting into a hose. If you don't get the exact correct fitting to use on that specific kind of hose the connection is of very dubious value. Some hose and fittings require a specific tool to hold everything just so to make a proper connection. There is a science to this. If you are really serious about this find a local hose shop like an Aeroquip dealer and get the right stuff. Shops like that will make the hoses up for you so you KNOW it is assembled with the right hose and fittings and done properly. Do that and then compare what it cost to what the vendor's kits cost. I am betting the vendor's kits are a better deal.