Information Unlimited is a well known rip off company that has a nasty
habit of charging unreasonable and enormous fees for trivial plans and
parts
that you can get elsewhere at the fraction of the cost.
Also, for those who happened to buy their "plans", by now you would know
that they hide certain components under the veil of proprietary design
such
as simple wood wound chokes and mini transformers which they sell for big
bucks but can be made easily if specks are provided (usually presented as
part #16546whatever, available from IU for $$$$). This also applies pretty
much for every electronic part they sell, and as I understand, they make
most of their money by selling to those who are novice to electronics,
don't
know good sources of parts or don't have time, skills and tools to put
everything together.
Oh yes, almost forgot, their assembly job sucks. In 1997 I gave our HS
physics teacher catalog and he ordered something out of it preassembled,
he
had to resend it back because unit looked like it was assembled by a blind
handicapped person with hands growing out of his ass.
I would avoid Information Unlimited like a plague…