By all means - go right ahead!...Do you mind if I adopt it as my signature line??

As to the OPs questions:
IMTU, a jump drive is used to make a jump, then to maintain jump - any premature failure results in a misjump. Misjumps can take any amount of time/travel any distance as randomly/fiat determined by Ref.
I make no linear distance and time correlation as this is not the nature of the mechanics with time be relatively constant regardless of distance.