Last week I swaped the S4 with the S5 board to solder on a couple of open resistors and it seemed to work fine by swaping the boards. However, now I have other floors that are intermittently not latching hall calls. I think my edge connector plug that the S5 board plugs into is part of my problem. I just reseated the board and the hall calls started working again. I'm thinking of just removing the wires from the edge connector all together and landing them on a seperate bread board with just the dropping resistors. Any thoughts?