I know exactly what you mean.  1 + 1 = 2  is simple if you understand the
basic principles behind the + sign and know that the = sign indecates the
results.  

I get loads of tips from this site which when you see them in front of you
"seem" so obvious "but" the original thought by some programmers and MVP’s  
is way above my level.

At the moment (today and for the last week and the next few weeks) I am
trying to combine the 3 access D Bases of an international trekking company
which when it's done will (hopefully) not only produce all the reports
(letters, e mails) that the clients require but also produce different
reports that the government require.  Combine this with ticketing for
airlines, permits from everywhere from Nepal to Peru and Tanzania - not to
mention secure accounts auditing (with they want – to be useable in UK
Pounds, US Dollars and Euros – all linked to a RealTime rate from the web) ,
etc etc. aaaarrrrrgggghhhh :-)

Like you say it's easy when you know - I guess that when I present it, in
all its full flowing simplicity and designed end-user ease (ha ha ha) their
IT dept will say. “Oh yeah, we could have done that”.  Ain't that always the
case?

has 3 seperate D Bases