The polyC tube is held in place via the blade holders that Strydur sells (well, when they come back in stock, anyway), and the blades are tightened in place via a thumbscrew.

As for your maglite, I don't see why it wouldn't work, but we'd need measurements to be certain. For instance, length, outer diameter, and inner diameter, would be a good place to start.

P.S. Welcome to the forum! []