the cardboard solution is too "cheap" even for me LOL
and I've seen that too Leo, and I did just buy a stock airbox on e-bay, on a whim, so I might try that... (I got lucky on that, the seller included the MAF!!! so I ahve an extra stock MAF now, and a C&L MAF too... time for some e-bay it looks like).
I guess I could figure it out with some cardboard, shouldn't bee too close to rocket science...
I destroyed my original airbox years ago when I bought the LMS MAF/Cone kit. Eventually I decided to put my original MAF back on the car, but I had to fabricate an adapter and it ended up extending the length of the intake so that it was really difficult to get that cone in place.
So I recently switched to a smaller K&N cone, it doesn't seem to be a problem (yet - I rarely drive at WOT, how would I know if the cone was too small???)
The Cerruti Stealth unit looks like a lot of fun to build, and I do have next week off work...