If you have the schematic (which I asume it did come with the previous kits) it's in my opinion not that hard to repreduce the same on an other print board
if you need to make something different than first try to find a schematic that suits (can always ask for help on this forum)
I have a program called "circuit wizzard" which has been a help, but it doesn't have the 556 chip in it, which is what i want,
with learning the basics I would venture on internet as there are quite a few websites that teach you the basics very well (explanantion of the theory can also be asked on this forum)
So on the timer chips, 555 and 556, could you explan what does control, threshold and discharge?
Robert-Jan