My Hatton’s now Accurascale ‘Bluebell’ is now fitted with a Zimo MS500N sound chip and a Minnow 4speaker from https://www.youchoos.co.uk/. Except for the speaker wires (purple) the remaining wires were removed.
Remove 4 screws from the chassis to release the body there 2 at the front 2 at the rear. The speaker fits in the Left hand side of the chassis after removing the small weight I stuck a sliver of 1 mm plastic card to insulate the speaker from the cast chassis.
It was necessary to remove approximately 3 millimetres from the cast chassis where the chip would fit this was to enable sufficient clearance I also deepened the slot where the interface board sits pin 1 is to the top of the board. I machined mine in a milling machine and deepened the slot with a hacksaw; the casting is quite robust holding it in a vice gently was not an issue so carefully cut it away with a hacksaw is a possibility.
Finally I lined newly milled area with 1
mm plastic card to insulate the chip from the chassis. It is necessary to shorten the pins on the MS500 to 4 millimetres long and
wrap the chip with 20 mm Kapton tape.
The Minnow4 15x8x4.5 is held in place on
the plastic card with double sided tape.
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