Surely, Alex's record will stand forever
It was my pleasure (and honour) to meet Alex in 1988 at a time I was planning an attempt on his Cape Town records. He was endlessly helpful and encouraging. Only the unexpected loss of my medical aborted those plans.
Since Alex's record-breaking flights the official-record aircraft-classifications have changed and (IMHO) no flights under current classification can be recognised as beating his remarkable achievements.
Notwithstanding this, good luck and God-speed to those who try. Cheers bm