Wassell Evolution Carbs - My Bad experience

I have recently finished the restoration of my 1970 Fastback, this was my fathers bike and has been in the family since 1982, I choose to fit a single carb as that is how he ran it, I thought I would save some money by fitting a Wassell Evolution carb, ( I have the Amal Premiers on my 1972 Interstate and I am very happy with these). On trying to start the bike I hit my first problem, it didn’t want to go, I went through all the usual checks and came to the conclusion it was a fuel issue so removed the carb.  The first 2 problems I found were the float level was completely wrong with the resulting incorrect fuel level, the second which I believe to be the cause of it not starting was the drill ways that allow fuel from the bottom of the float chamber to the pilot jet had not been fully drilled so no fuel could get to the pilot jet. I corrected both of these faults and refitted the carb, the bike started but didn’t run well, it was impossible to adjust the mixture to give a stable tick over, after my first test runs it was clear the bike was running rich even with the air screw out 4-5 turns, I fitted a smaller pilot jet but no significant  improvement. After about 150 miles, I removed the carb once more, on examination I found the seat in the pilot jet circuit that the jet seals against was not properly machined so fuel could pass past the jet as well as through it, during my attempts to try to rectify this the pilot jet broke in the carb and I admitted defeat.  I have now fitted a Amal Premier carb the bike started first kick and runs well returning 65-70 mpg (up from  less than 50). So in trying to save money I have wasted £85, I may have been unlucky and got a bad one, but it is clear that the Amal carbs are far better engineered,  I also wasted £49.2 on a Wassell kick start on the same restoration (badly machined spline which allowed the kick start to twist and hit the silencer/exhaust) which has gone in the bin with the carb.