Internet Sol-fa v1.1 OK, using 1...7 instead of d...t essentially changes nothing. A note by any other name would sound as sweet.
So, as an option, and without renouncing any long standing rules, if you have a preference for numbers instead of d-r-m go ahead and use them, if you prefer the '#' for accidentals feel free.
This variation will officially be known as "Alison's Sol-fa" or "Numeric Sol-fa".
Cheers,
Alan