I also use DeltaCad. For $39.95 it is perfect for our balsa / ply toys. I print up fullsize 1:1 dwgs at the local archetech type printer guys and glue the dwg directly to the wood w/ spray77. When it's time to assemble.....wow! the pieces fit like machined parts should. It is not a perfect piece of software compared to ACAD that costs thousands $$$... but it is easy and accurate for 2D work.

I use WinFoil... can't beat the price at less than $50 bucks.

Take a look at my other thread on the DeMilo and you'll see the finished product.