Absof**kinglutely. i call them HOST synths, i've been planning for them to be used like this from the start and i will be building myself one as soon as i can take a breath. i have something else unrelated coming out next week i hope!
but yes get a bunch of jacks, knobs, cables, a case and a single 9v or 12v ( or whatever : ) wall adaptor with like a 500ma rating or something ( more or less ) and you can just snip the ends off of the battery clips and wire them all to the one supply, maybe cut a little chunk of stripboard to keep it clean. i have already incorporated power filter and shit into each design so you don't need any extra parts. i might even build a little power distro board too for like ten units with some extra features. i guess i could just show how to diy one using stripboard, very simple stuff
back to the amperage thing just to be clear. i will be posting each units current draw on their pages so you can just add up the total for all the units you get and then get a supply that is larger then that. very very simple stuff and nothing to be scared of. just add up the numbers and if they total for example 120ma then you get a 200ma adaptor or larger. larger is always better but too big like 800ma can start to get dangerous if you are doing things like touch contacts if you bend them. there is no truly safe rating though when dealing with wall power so don't blame me if you get shocked by grabbing random wires
nice to know someone is going places like this their head. and they aren't noisy in a low quality static sense btw
if you want i can start making a list of places to get parts cheap like cables for 3.5mm here http://www.allelectronics.com/cgi-bin/i ... ENDS_.html
i have a bunch of those for my real modular and they are actually quite nice. two foot might be too long ( actually about 28 inches ) but you can just snip them in half and get some plugs and make 2 cables out of one. also mouser has some very cheap 3.5mm jacks, i can find those if you like. they are also switching jacks so you can have them normalled so you don't "have " to have plugs in to use a basic function and then you can bypass the normalling when you insert the cable ( if you don't know what means then just ignore it for now ). knobs are cheapest at futurelec http://www.futurlec.com/SwKnob.shtml
and this is where i get my pots so they will all fit. if you go with ¼ inch cable instead then they have cheap jacks too http://www.futurlec.com/Audio-65mm.shtml
and don't be afraid to ask questions.... i can usually make things go a lot easier