james65477564 Excellent 😊 Glad it worked for you.
The motor housing is held with 2 pozi screws, which screw through the housing into the top cap. Remove the sticker on the base of the housing & you’ll see the holes where the screws are fitted (The two conical towers on the pic) . Remove those & you can pull the housing & internals out.
The motor casing is actually two parts; The main cylinder, which slots into the keyways on the replacement housing & the top cap with the button press on.
The internals aren’t fixed & just sit in the recesses on the housing, you just have to make sure everything is orientated so the button & charging port line up with the top cap
Careful when you reassemble as the top cap is plastic & over tightening the screws could damage the fixings