That injection setup is just flat drop dead kewl!!!! Really first rate work on the whole project, very well done!!!!!

As for patience, I've improved on mine over the years to the point that I enjoy taking the extra time for one more re-do, or just looking at an "engineering opportunity" for a few days and work on something else on the car. Found that if I just stay at one problem till it's done, regardless of the frustration level, I usually end up with another re-do anyway!!!!