Changing Character Class

[Zulgyan]

From M&M p. 10:

Changing Character Class: While changing class (for other than elves) is not recommended,
the following rule should be applied: In order for men to change
class they must have a score of 1 6 or better in the prime requisite (see below) of
the class they wish to change to, and this score must be unmodified. A Cleric
with a "strength" of 15, for example, could not become a Fighting-Man. In any
event Magic-Users cannot become Clerics and vice-versa.


Have you ever used this? If so, how did you implement it?

If you have never used it. How would you implement it?

I see numerous issues to be solved, but mainly:

Hit Dice
Attack Table
Saving Throws

[jrients]

For all three cited issues, I would probably go with the better of the two classes.