Just wanted to check its not going to be a problem.
It's an HD wallet so all the old addresses are completely valid and will always be valid with the same seed. I use old addresses on there quite often and it all goes fine. It'll combine outputs from the old address with any other ones if you've received on other addresses.
If you want to check, not that you need to, click on accounts and then sign message and it'll show you all your addresses.
Excellent, I thought that'd be the case. Ideally I want to shift all the BTC into a new address to get the cheapest transaction fee possible when sending priority, this is because I need it to clear fast for a price fix. But the actual consolidation doesn't have to be fast, I sent something economy the other day and it took a few hours to confirm which is fine.
Does the wallet have a certain method to consolidate separate accounts and keys into one balance that would then go more cheaply then any address that has multiple in/out transactions on it. I would guess this isnt possible as it has to be cleared via the blockchain which is another fee but if it has these multiple addresses anyway is it possible to clean it up a bit perhaps.
I should already know this but I've been using alt coins for years with block time under a minute and a penny cost. However the non crypto company I deal with now prefers I send from a BTC private wallet only, to the point where its a bad price if I dont so its worth me finding out the cheapest method for the future.
It doesn't matter if they are in the same address or different. Each time your receive a tx its going to create a new unspent output.
So, you are still going to have the same choice of outputs for any transaction. I think spending money to combine your outputs is counter productive. Having all your receives into one address doesn't change the underlying protocol.