I have rebuilt Nautilus BVC coils. It was one of the worst, not to mention we drilled the holes out too. You might not need to drill the holes on the 'newest' version, of course.
You'd do better to buy a tank with an RBA section/base.
The RBA designed for mini Nautilus created a lot of interest in the UK last year. Very few people use them.... there was a reason, I think it was something to do with physically getting the tank back together and the base not having quite enough room to screw into the glass section 100%.