ive got a dash pod rev counter atm tom and i havnt yet fixed it down , was going to use some self tappers but your going to have to drill through your dash any way to get the wires through ? (although the angle of the window made it impossible for me so i used a hand held bore thingie)
i did try double sided tape like kenny said but couldnt stick it down with the curvature of where id placed mine but its definatly worth a go before making too many holes in your dash
