In Gordon writes:

Anybody tried these rubber things that go on regular winches to make
them self tailing?
Gordon

The representative for Lewmar said about them, when they came to the
market: I hope everybody without a proper selftailing winch will buy
then, because after they get used to the idea of selftailing, they
absolutely want to have the proper thing instead of these failing
devices.

- Lauri Tarkkonen