Negative Supply 120 Mk1 vs Mk2?

[Harry]

@Harry

but I don’t recall anyone on here actually using them

So I see that this thread asks about them:

VALOI vs Kaiser Film Copy Vario

Meanwhile, I got the basic Negative Supply holder 120 Model 2. While it works to expectations, it has a few flaws that are both technical and administrative The holder sits in a trough that makes it difficult to insert the film because the top frame of the trough is too close and blocks reaching the end of the film, which is not a problem with uncut film but with cut strips. There is a gap between the film holder and its trough and film often gets in there. This gets annoying after a few attem…

I’m hoping @BDS might be able to say how they have been getting on with the Kaiser Filmcopy kit? Has it lasted well, are the format frames metal, does 120 film stay flat, do Kaiser answer emails (it seems that Negative Supply normally don’t)?