On 10/01/2017 10:43, Mattia Ferrarini wrote:
Don't think you'll be able to make one with a long loop like that.
It's a complex mechanism and you need to maintain tension across
the head. (I made a short loop cassette once, ....fun)
They were available commercially at one time though, intended for repeating
On ebay as "Endless Cassette".
TDK are good quality and old ones *should* be still good.