RE: Making my own battery
If you read again - the op has no experience with this. He is asking about some sort of glue...maybe that sort of questioning tells you something.
So he obviously hasn't done this before. Yes, it can be done with a soldering iron, I can do it too. You are missing the point.
But for a beginner it will more then like be fatal to solder his battery packs.
This is a plane, not a car which just stops running when the battery fails.
If you do this in Europe, the insurance will decline coverage if your plane falls out of the sky because you poorly installed your radio or your homebuild battery failed.
Anyways - the cells many years ago where a lot easier to solder. Did you ever look at a newer battery pack?
The ones I have are spot welded - hard to break apart.
What is simply wrong here is to giv the op teh poor advice that it's ok to solder. Get a ready made pack or get a battery holder and be safe.