vin changing- csp

I have had to change vin numbers in the past between me and a couple guys and try different tunes. Since it is recommended to flash tune then read it and change bidirectional function to new vin. How can my buddy and I run the same base tune and tweak indiviually if I can not read the file from the ecm. It is ok to just use the bidirectional funtion with out loading it on a vehicle first. I really want to learn more about the functioning of the capabilities of the tuning but need some guidance on many things if I can not figure them out. Thanks anybody.

Really no need to read out just change vin in 7.5 tune tool . Or script your tunes and run script on there stock files read is more for your base tune of your truck unless i am missing something here.

OP wants to swap csp-5 tunes built between one truck and another?

Yes Les that's what i want to do. with out copy and pasting every table. is there an easier way or can i just switch the vin the regular way.

VIN change is the simplest

thanks les just didn't want to brain dead my ECM