Special
Probably not that important, but for VFR flights, should the routing information be written under "Route" or under "Remarks"?
The route section - you were ill advised at Sabadell by someone who'd obviously moved his mouth 3 foot downwards
down&out
A number of places, eg Guernsey, ask that a specific address is put in the address section of the Flight plan. Now in the UK I've always been told to leave the address section blank and so have assumed the filing ATSU recognises where these requests are needed and completes them
Not your problem - whoever addresses the plan should know any additional addressees and include them without any input from yourself (made easier these days by "Colective addressing")
Aim Far
a) Departure, Destination and any
mandatory addressed associated airfields. En-Rte airfields don't get them and alternates only get copies if the addressing unit includes them as a separate address
b) Correct. IFR is different 30 minutes either side is acceptable, any different and it has to be changed or delayed. If an IFR plan is not activated within 30 minutes of EOBT then the IFPS computer dumps it and you have to re-file (so DLA's are important in those cases).
c) Delays require a "DLA" message issued by the same agency that filed the plan in the first place, bringing it forward often entails cancelling and then re-filing (if you don't fulfil the answer to (b) above
d) Shorter is fine, but allow at least 30 minutes to get it input into the system for Intl FIR boundary crossing or if the flight wil take place in CAS.
e) Correct. The UK has the concept of the "responsible" party included in the ANO whereby if you don't turn up someone will notify the authorities. No news is good news principle
f) No, as the alternate would not expect to be notified of your arrival at the destination anyway.