Carb Balancing - Flow Balancer?

[Peter Zutrauen <peterz@zutrasoft.com>]

I was wondering what is wrong with using a simple flow-based carb
balancer? Years ago when I was playing with my 'hopped-up' VW beetle
with dual carbs, this tool worked very well to balance the carbs. Just
dial the restrictor to center the ball on one carb, then move to the
other carb and check the ball and adjust accordingly. A few iterations
and you're done!

Here is the type I am referring to:
http://www.datsunroadster.com/PIC_PAGES/NEW_PARTS_PIC_PAGES/999-08.htm


Opinions?

Thanks,
Pete
A239