I'm designing HHO generator with the stainless steel cups like dallas goldbug did.  Im making sure he has credit cuz its an amazing system and way cheap. i've spent 18 dollars so far. (tho i need to pay for electronics next probably )
Anyways if people wanna help with small things i'm gonna try to keep you posted on my progress. Its slow cuz i don't have time to work, and i need to buy new drill bits and use someone's drill press cuz my normal drill kinda epicly failed.  Any recommendations would be cool from anyone who has done this before.

I think it would be cooler to make one then buy one, and I plan on first making a HHO torch for kicks and giggles, then im going to put it in a cheap piece of crap car ima buy to test it out. 

OU.com ROCKS!!! SO HELPFUL

thanks for your reply.  a lot of people who bought them predrilled said they sucked. no offense to him, but if hes gonna sell them he should do a good job. How much are those cups running you up? are they cheap or what.  I did notice that the walmart cups aren't magnetic, but that doesnt nessicariy mean they're 316.  Tell me how the medical cups go for ya
Im gonna go buy some cobalt drill bits now thanx for the headsup

thanks,
~RogueLeadR

hey i found some carbide drill bits at home depot they're kinda pricey, but they're worth it from what i've heard

http://www.homedepot.com/webapp/wcs/stores/servlet/ProductDisplay?storeId=10051&langId=-1&catalogId=10053&productId=100393465

Your link is for "cobalt" bits, not "carbide". Those look OK, unless you need a bigger size than 3/8"
I had to purchase a 1/2" cobalt bit for the design I am using.

I also received those SS medical cups today, I will post pictures later. They are pretty small, but still should work.

my bad i meant to say cobalt.  yeah my design calls for 2 holes, one 1/4 and the insulated one for 3/8.  at least that is my plan.  yeah i wanna see those pics and maybe i'll buy some from that ebay store.  they're a bit pricey compared to my wal-mart ones but if you get better operation from them tell me and i'll consider it.

Here is picture of cups, beside Walmart cup
(http://i268.photobucket.com/albums/jj4/fostervs/cups.jpg)
They are rather small at 25ml, however seller has larger (50ml, etc.) I haven't had time to do anything with these, I am going on a 3000+ mile roadtrip, and will be testing my current HHO generator (6 Walmart cups) and my new one below.


Here is my latest build, with 10 stainless plates. I have tried here in Canada to get 316L stainless, but unless I want an entire 4'x8' sheet, or am willing to pay hundreds of dollars, I haven't been able to purchase any. I may have to break down and buy some off eBay.

This is built using 10 stainless steel wallplates (buy these at an electrical wholesaler - I paid 99 cents each VS $2.50 each at Home Depot) - used a "dead blow" hammer to flatten them, cutoff saw to cut the corners, cobalt bit to drill the holes. They are suspended on threaded stainless rods, which are also the + and - feeds. Plates are connected together with nylon bolt through top and bottom holes, with a rubber plumbing washer between each plate as a spacer. Box is 6mm lexan, which is nice to work with but should actually be thicker. It is nice stuff because you can drill holes and tap them, and just thread your fittings right in.
(http://i268.photobucket.com/albums/jj4/fostervs/new.jpg)

Wow beautifully done. 
Really quick, i have a question. On your Wal-Mart cups cell, what did you use to hold the cups while you drilled them? Dallas said something about making a jig to hold them, and I do have some designs in mind, but maybe yours would be easier.  Can you just take a picture or explain how you made it? It would be much appreciated. 
~Thanx,
RogueLeadR

I made a wood jig at work to hold them while I drilled. The holes aren't perfect, but it does a pretty good job. I will take pictures tomorrow and post them.