Digital BW, The Print

There was interesting talk of late about wet film mounting on a 
flatbed scanner, namely the Epson 3200.

In the search for supplies i've come across two items for which i'd 
like some clarification.

1- Tesa mounting tape is not inexpensive. However, there is 3M 256 
and 3M 202 masking tape which is sold by as a scanner mounting 
product. 

2- On the Mediastreet site: "Ultra-Base is a specially coated plastic 
sheet that is used to mount transparencies on the scanner drum, or 
flatbed scanner, to eliminate the need for oil mounting"

(for scans with enlargements over 700-800% you can use Mylar GA-10, a 
pure, crystal clear, untreated polyester)

Any one have experience with these two products?

Cheers,
Andre