"sufficiently before" is correct and usable in written English.
You can use it when you want to explain that something happened or was done well in advance of some other event. For example, "We submitted our proposal sufficiently before the deadline so that we had time to make any necessary revisions."
Allow to cool sufficiently before eating.
Can the fibroblasts be expanded sufficiently before viral transduction to allow for the generation of a sufficient number of differentiated cells?
None answered sufficiently before the vote was bulldozed through.
Make sure your coals have cooled down sufficiently before you start.
Serve within 1 hour if frozen solid; allow 30 minutes in the fridge to soften sufficiently before serving.
In most other places, pilots would simply wait until the day had warmed sufficiently before starting their flights.
The difference for the more narrow vessel is larger because the FM device does not have a chance to sufficiently open up before hitting the vessel wall and is still exhibiting a configuration very close to the crimped one, due to the unsophisticated FM contact model.
Make sure the mash is sufficiently smooth before stirring in the greens.
Check to make sure the overhead fluorescent lights are sufficiently loose before you leave so that they'll be good and flickery for the next person.
In order to do this, we need to utilise the last of the autumn growing season to ensure that the track is sufficiently recovered before the winter".
The boy, Dillon Cossey, will remain at the center, in Western Pennsylvania, until he turns 21, unless the courts deem he has been sufficiently rehabilitated before then, according to the ruling by Judge Paul W. Tressler of the Montgomery County Court of Common Pleas.
