Ok ordered parts to build
this USB/RS232 serial shutter control via COM port. Thus I can connect and run the camera using any tether software and control the shutter via the USB/RS232 COM port, I can use software like DSLR shutter, Sequence Generator pro, possibly BYNIK etc etc.
Costs of parts....~ $25 all up. Although instead of buying a MC-DC1 remote shutter controller for the D70s I purchased a
std 3.5mm to MC-DC1 cable. The reason is that I already have a intervalometer that uses the 3.5mm plug...so I can use this as the intervalometer shutter release...or the USB/Serial COM port...."swappability"...if thats a word!