Well, I did the white spacer mod last weekend with Lancer's kit.
Anyhoo, I thought I would pass along my little tip for removing the 4 screws off of the top of the carb.

I took off the carb and paced it on a couple pieces of wood (one on each side so that the drain tube wouldn't break).

I used a #2 screw driver. I pushed down hard and tapped the top of the screwdriver with a hammer while trying to loosen the screws.
After a few taps, the screws gave way very easily. This effect is much like a impact driver: http://www.sears.com/shc/s/p_10153_12605_00947641000P?vName=Automotive&cName=...

Hopefully, this will save some frustration for others.
Also, buy a nice screwdriver-those 50 cent ones will strip out something. It's not like you would never use it again. Saving $4 on a junk screwdriver will cause you extra work and tools to remove the stripped out screws.

Hope this helps,
Ken