I'm not familiar with the brand but Graupner had one--------I'm guessing about 1975 + or -.

It was a prop aimed at the Pattern group and while a number tried them (including Hanno and Steve Helms) I believe they were discarded in roughly a year, maybe two.

In the last year or two there has been one for gassers in the Mags. and I believe there was a product test even though it was (as I remember) pretty much a one or two off deal.

That happens to be one thing I have no interest in buying/using. I remember the comments on Graupners----------by those who used it then. The conclusion was that it was needless complication.