How do you get your tiers perfectly centered on top of eachother? Is there some special way? I just eyeball it, but I am concerned that they are gonna be off centered. Thanks for any advice will be appreciated.

SPS!

Yeah, sps is the easiest, if you don't have it, measure. If you have a 10" and an 8" on top then measure 1 in from the outside perimeter of the 10 inch mark it with a pin prick in several places then match up the 8" to the pin marks.hth

I use a clear perspex template with holes that are drilled through it, mark the placement for the above tier, and pop those skewers right in.

I found something I really love at ICES the cake support system at www.cakethings.com cheap and it is sturdy and well designed