Rejet requires taking the bowl off the carb,.....no kidding now !
I found that to be a relatively easy job,.....only because I went into it w/ the thought in mind....that the screws are going to be very tight,....that if I let the flips driver slip once, I'm done....finished !!
To guarantee that the driver doesn't slip, (mine did not) requires mechanical (not human) upward pressure on the driver while cracking them loose.
I used the bit out of my reversable screwdriver which had a hex midway that I could put a 7/16 wrench on. Then using a 3/4 x 3/4 stick about 5 1/2" long (nice to have a table saw) for a vertical shim, I was able to use a prybar to get the upward pressure on the end of the driver bit, needed to crack each one loose.
Like I said, if you let the driver slip once, you will be R&Ring the carb.
I just opened mine up to rejet for the first time and knowing how hard all these screws are supposed to be I was worried about slipping too. My first concern was when I went to drain the bowl, that screw was so darned tight I just knew I was going to slip, but luckily the screwdriver I was using held & I was able to loosen it. Then I was pleasantly surprised when I went to take the bowl off, mine came out relatively more easily than expected. (Replaced them all with allen head bolts thanks to Motobudda just to be sure next time)