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Glad that they are going together for you. They weren't that tight a fit for me. The reason you may be getting a tighter print may be that your filament diameter is too low so you are laying down too much plastic. Fixing this can be a difference of 2 tenth of a millimeter, the difference between a snug fit and needing a vice. Getting filament diameter right was the first thing I learned and it's served me well as a silver bullet.

If you don't have a digital caliper you can test your filament diameter using the filament diameter test I uploaded a few day ago.