Gyratec G21 Magneto-Dynamic Infundibulum review

[Note: I have written an addendum/update to this review, about a year later. You can find it here.] I haven’t exactly been asked to write a review of the Gyratec G21 Magneto-Dynamic Infundibulum, but there have been a lot of questions about it from interested people. It made sense to write a review that I, or […]