I think Dave Bissett may have actually used the CF socket and the large GPIO connector on a Balloon, so he is well placed to answer this query. The standard connector QTE-100-01-L-D-A-K is the one standing lowest off the board surface, and so a PCB attached to its counterpart QSE connector interferes with the CF socket. Connectors which stand further off are available; the -01- is 5mm thick and 8mm and 11mm and more are options. It looks as if the -02- part with its additional 3mm height will hold a PCB clear of the CF socket, (though there would be almost no room for components on it where the CF socket is). Dave, what value of X have you used for a QTE-100-0X- >with< CF socket, please ? Thanks LvS _ ASCII | -- ( ) ribbon | Laurie van Someren at Aleph One Ltd X campaign | Old Courthouse Bottisham CAMBRIDGE CB5 9BA UK / \ against | Tel +44 (0)1 223 811 679 Fax +44 (0)1 223 812 713 HTML e-mail | http://www.aleph1.co.uk/ mailto:laurie@aleph1.co.uk