Reason I ask. To know if securing the seed is adequate for a restore or not adequate.
I'm sure you realize it now, but for the sake of others that stop by and read this thread...
This, right here, is one very important reason NOT to import private keys.
Spendulus now doesn't know if his backups are adequate or not. If he never imported seeds, he wouldn't need to worry about it. I'm sure at the time of importing the seed, it didn't seem like a big deal. He either figured that he would remember to store the private key separately, or he thought he'd remember to back it up separately.
Spendulus,
The only keys that really matter are the keys you are using. I'm neither an Armory nor Electrum expert, but I think both of them offer some sort of "coin control" features that allow you to see which addresses have bitcoins on them? If so, then it should be possible to generate a long list of addresses from the seed and see if any of the addresses in use are not on that list.
Bolded above is the very point.
Any situation where one "does not know if his backups are adequate" is essentially a situation where one has no backups.
It had crossed my mind that a full audit of the transactions would answer the question, but identifying keys that were generated from the seed as opposed to those which were imported .....
Well, I can think of some ways to do that in an excel spreadsheet. More private keys floating all over the place to try to resolve an obscure issue about the validity of private keys....
An associated point to be made is that this is the very situation with all the people who have imported lists of private keys into a wallet such as Electrum to recover bitcoin cash or gold. The only way to get recovery from seed to work would be to move all those funds from imported keys to keys generated from the seed.
