Lowrance flush mount kit

If anyone else is appalled at what Lowrance wants to charge for 4 screws and a template (which they call a flush mount kit and charge up to $30), then this information will definitely help.  The screws are M3 x .5 x <length needed>.  I used a 10mm length for mounting it onto 1/4″ birch.  Lowes in my area have panhead slotted screws in this size, but I couldn’t find them at Home Depot.  Total cost – $1.12.  Shove that up your fishfinder, Lowrance!