I put together a 20 shot cake for my 20th birthday, and fired it earlier.
20 shot cakeI used scavenged 14mm tubes from a chinese cake I fired for new year, it was more to prove the concept worked, and some of the lift amounts could do with fine tuning.
Also for some reason not all the salutes went off, which consisted of a 10mm insert, 1/2" of time fuse with bright flake + titanium flash and end caps, although the time fuses definately ignited and were seen to be rising. Similar inserts with veline stars and BP burst worked.
I was impressed with the brightness of the Davis antimony trisulfide fueled white stars though, especially for the cost of them.
I used the chinese construction method of threading a single piece of fuse through all the tubes, then gluing together around a former. Each one was filled in the normal way, then approximately 15ccs of fine sawdust was hand pressed onto each one. I have pictures if anyone is interested in using this method.
Hopefully bigger and better cakes will be on their way this year.
You can never have a long enough fuse...