Great Lakes Garrison & Base

I I started me build over the weekend. Started with the forearms I used a 5/8th finishing strip on the front but on the left I had to use a 7/8th on the back fits great not to much slop but the right I had to use a 5/8th on the back and it's all loose is this normal or did I go wrong somewhere.

The forearm armor is usually loose unless you yourself have large forearms. Most of us pad our forearms with foam to avoid the forearms from spinning around while wearing them.