Steve,
I used removable tape. Just doubled it up & placed it in the slot for the chip. Have not had a chip fall out yet & just removed one to see how the back of the chip held up. It was not sticky, so it works ok. Would much rather have had them in Air-Tites like you do, but this clock did not have big enough slots for that.

If you do end up taking orders for your clock please add me to the list as I would like one. Just let me know how much & how you would like to get paid.

Also, did you have extras of the chips you used that we could get from you if we order a clock? Or would you want us to supply our own?

Andy - Las Vegas