Endfloat

[varleym]

In preparation for rebuilding the front axle internals with the new halfshafts I've been thinking about how to sort out the end float and I've got a few questions:

1. How crucial is it to have endfloat within the tolerances set in the spec (according to Haynes in should be 0.12 - 0.25mm).
2. I've not got a dial gauge so could I just use feeler gauges?
3. Any other tips for setting endfloat?

Cheers

Mark