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I recently built a 90mm f10 for solar work, and used both a laser ( pre-collimated!) and the Cheshire.
The laser does help to align the axis of the focuser to the centre line of the objective ( I used a white plastic cover marked in the centre over the end of the tube infront of the objective) the laser dot can then be lined up with the centre of the objective by tilting the focuser body relative to the tube.
The Cheshire with a bright LED torch shining in the side, should show shaded concentric rings reflected from the rear of the objective lens elements. Adjust the tilt of the objective and lock in place.
Suiter cover's the Cheshire method very well in his book " Star Testing Astronomical Telescopes", p121 -125
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