visa gap How to prove SAR file to officer ?

Hello all,
Could you please advice me.I've been in the uk since 07 feb 98 through a combination of student (7yrs) and wp(3yrs).I am applying to ILR soon but still confused because of gap.Below is the information from SAR file.My questions are
1.Should i apply by post or apply by person?
2.Which date should be fine for apply by person?
2.Do I need to take SAR file and with me?

Visa Issued Date Visa Valid post Room/App raised
07-Feb-98 30-sep-99
25-sep-99 31-Mar-00
10-Mar-00 28-Feb-01 21/Feb/01
12-Mar-01 29-Feb-02 20/Feb/02
20-Dec-02 15-July-03 04/jul/03
4-july-03 31-Oct-04 19/oct/04
19-Oct-04 31-Oct-06
28-Jan-05 27-jan-10(switching workpermit incountry)

Thanks
Thein
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In general, all complicated applications should be submitted by post. As advised on making an application, always keep proof of posting.

To get a clearer picture, can you include the dates on which you were present or not present in the UK as well?