Should I keep it like that or put it back to original as I rebuild it?
That is entirely up to you !
There are some that say that a magneto will ALWAYS get you home.
But it has to be in GOOD condition.
of old refer to the yearly servicing of same, by your local Lucas
These days, some magnetos may not have had a service for decades ...
And some say that points and coil will always get you home.
Your generator/alternator and probably your battery
(and wiring) has to be GOOD though.
Notice anything in common here.
Keeping electrical stuff in GOOD CONDITION is the key ingredient here ?!