Any parts that are having trouble fitting together I check for;
- Snots (bits of erroneous resin) if I find I'll clean off
- If it's pulled out of shape (differences it thickness main different shrink rates) I put the 2 halves into hot water till the resin softens then squeeze the parts together under the hotwater till they marry up then run them under cold water to reset.
Then all the parts get the dust washed off them and the undercoat, then I glue the half's together. Then its final test fit. Any bad joins or gaps are filled/sanded I make sure everything moves smoothly and fits flush. Then the rest of the model is pinned and glued into their main parts ready of a final dusting and undercoat. I'm almost that this stage just need to work the hunches so they sit flush, some gluing, adding magnets and off to paint yippee.