Ahhh ok that makes sense. Will the extra length likely be an issue or should it be fine for a few practice dives?
You tell me. Will the extra length be an issue for you if things don't go as planned? Will it contribute to whatever problem that develops? Will it be the cause of a problem that develops? Do you have the experience to mitigate and/or otherwise deal with this should it be a problem?
I don't know what a practice dive is....a dive is a dive in my opinion and experience. Physics and physiology do not change when one is just doing a "practice dive" compared to a non-practice dive.
-Z