Hi!
question 1) have you got BVC coils or the 'old' BDC coils?
question 2) have you considered that the MVP might not be a good combo with Nautilus?
The day I swapped from Kanger Protanks to Aspire BVC was also the day I put my MVP up for sale.
I know this sounds a bit unfriendly, but the MVP didn't cut it for me with mini Nautilus, and many others (UK forums) feel the same.