Regarding v1 and v2 of your dryer, most dryers I've used require removing the film from the roll.
There was one exception. I did use one once that was provided by a college photography teacher which was basically a large hair dryer. Imagine a hair dryer about 2-3 times the size of a regular one, and made in the 1970s. There was a note taped on that said the recommended amount of heat, which I think was either a very low setting or heat completely off. It really did look like a product produced specifically for drying film, not a home made garage project. I don't recall if there was a filter or not on the inlet, but I never saw dust, it was at least as effective as the dryer at producing dust free negs as the cabinet. They also had a traditional film dryer that students used when they weren't in a rush, wherein they would leave it overnight. I sometimes had dust from the cabinet because after I hung my film, other students would open the cabinet to put in their film, so you were somewhat at the mercy of how careful they are.
However, the quick dryer didn't do as good a job at flatten the film so it had less of a curl. Not sure if that was due to the shortened speed of the drying (emulsion shrinks and causes a curl) or the fact that the film was still on a roll, possibly both, depending on the film.
For a photography class, it was handy to have your film totally dried in 5-10 minutes so you can process and print all in a 2 1/2 hour class and take your negatives home. The teacher used some judgement to nudge students to use the quick dryer or not, possibly some film emulsions withstand the heat dryer better.