The Keyser kits are fine for most situations, but the K&L have the needle jet nozzle those are shot. The cheapest route is PartsNMore. $48 plus $3 shipping. Those are the Keyster kits also.

I'd rather give someone a tool than a solution. Give them an answer and they'll always expect it. Teach them how to find the answers for themselves and they will spend a lifetime learning.
As for my mental state?
"Not User Friendly"