Hi folks, I need to know urgently the differences between Nikon F4 and F4s ... I guess it´s just the motordrive ... MB20 in the first and MB23 in the second ... If I buy a F4 and when I have money I buy a MB23 can I replace the original MB20 to have a F4s??? Thanks, Charles "It´s no better to be safe than sorry" In "Take on Me" song by A-Ha _________________________________________________________________ Join the world’s largest e-mail service with MSN Hotmail. http://www.hotmail.com