I thought that the idea of 'supercharging' your FSD was brilliant, so I used this method to jump whenever I could when out exploring.
Then came along the issue/bug - I started getting (as other cmdr's did too) server disconnects when in a NS/WD system or when jumping to the next system. Upon reload, the game placed you back inside the jet cone with your ship taking severe module damage & you were very lucky to get out of the jet without seeing the rebuy screen.
This happened to me on several occasions, annoyingly when I'd moved well away from the NS & had been scanning other planets in the system. The damage taken by my ship was always moderate to severe.
So I then decided to avoid the systems until FD acknowledged that they'd sorted the issue out.
Thankfully (eventually) they did resolve this issue & I can report that I am now closing in on Beagle Point, after making a trip through a NS field in order to speed up my trip there.
All this with none of the earlier issues.
My trusted method is
Enter the system at 0% throttle, scan the NS.
Choose the longer of the two streams (this is the one coming towards you), turn towards it slowly at around 5% throttle, making sure that you are entering the stream near the end of the jet stream while moving away from the NS.
When you enter, it'll take around 5 seconds to charge, then hit full throttle to escape the stream.
Keep an eye on your FSD module, it's losing 1% per jump. When the damage drops into the high 80's, drop out of SC & repair.