The electronics from the 2.6/ 2.7 can be reused. The camera on 2.6 needs to be disassembled as in the 2.8 guide.
Just dismantle the case, until you are left with the board and cable.
If using the old style lights you will need to glue (Hot or super) the camera board to the new pan tilt piece then the lights can be attached with glue to the front
Old lights if super glued to the old pan/tilt board can be reused it just requires you to cut the acrylic as close as you can then stick the whole thing on.
If using the light board follow the normal mounting procedure
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