Nice post, I too use bitsbox, bob is a great guy and his service has been impecable over loads of orders I???ve placed???.in fact my entire lunnetta modular ???blarp??? was built with cmos 4000 from bitsbox(and indeed includes a couple of 4015???s I can recommend the lunetta/cmos approach for getting into single supply modular noisemakers as they are pretty easy to work with and there is a lot of