For prep, I removed all the paint off of the receiver-tenon interface surface and the barrel shoulder surface with scotchbrite. While you are at it, I’d recommend scotchbrite on the receiver’s inner grooves and bolt mating surface to remove the overspray.
I put the barrel in the freezer overnight and heated the receiver with a hair dryer.
For less mess, i put a thin layer of anti-seize on the receiver barrel receiver surface Instead of on the barrel tenon.
I had about 45 seconds to align the extractor and level the Vblock to the receiver. If it gets tight and you need to readjust, just heat up the receiver again with the hairdryer and it should twist without too much effort.
Have fun with the Kidd barrel. On my Kidd ULW barrel, it even shoots CCI SV well.
YMMV, happy shooting.