Finally I have been
successful mounting new tires without damaging the tubes!
Well I did nick one tube but got it repaired and correctly mounted second time around.
Just completed a short 4 mile trip to RedBox in the rain . . . so nice to know I've got tire thread again.
Original SEG purchase set of tires were replaced at 4,125 miles, now at 8,089 so second set got 3,964 miles. Well within the typical 4,000 miles for SEG Factory no-mark tires.
A positive Sunday project completed.