One step forward, two steps back...
Seems to be a common theme as of late. Keep at it, you'll get it eventually. You are in the fine tuning phase now, working out the minor details. Soon you'll be able to enjoy the fruits of your labor without issue and you'll know the car is perfect....because you made it perfect with your own hands. Glad the new rear is quiet and the mufflers are "better".
I'm down to polishing last year's number magnet stains off the doors and fine tuning the vacuum advance with Barney, and driving it as much as I can to break in the new clutch properly. Glad the mad rush for this year seems to be behind me **knocking on wood**