Using roundwound .45 and want to try flats but which guage?

[tildeslash]

I am currently using 45w-65w-80w-100w (Super Slinky Bass #2834).
Should I used the same gauge in the flats or 1/2 round or dimensionally I need to adjust to a larger size?

Actually I am asking that if I am using the above mentioned gauge of round wounds.
What gauge should I be using for a similar feel and what impact does it have on tension?

[mmbongo]

In general, flats will have much higher tension than rounds, so you may want to go lower.

[hotbass57]

+1 on lower tension.