Yes I ride on patched tubes, never been able to tell a difference.

I also ride on patched tubulars. Never had a problem with those either. Would even race on them, A lot of riders rode on repaired tubies, but no one would admit to it. There was some unwritten rule from the Gods that riding on a repaired sewup was unforgivable.

When I was young and in college, I patched tubulars at night in my dorm room for $5.00 a tire. Of course, no one ever admitted to using my services. But I patched a lot of Clement Seta Criterium tires. Paid tuition for two years that way. Tuition was actually affordable in those days.