I am currently cold crashing in my Spike CF5. I have my PRV set to 5PSI to avoid such back. Once I finish, I will force carbonate at 10psi in the CF5 Unitank. I am confused as to the best way to do a closed pressure transfer to the keg using a spunding valve on the keg gas post? Some folks say keep at the same PSI, some say make the keg slightly lower. Then some are applying pressure to the keg during the sanitizing process prior to transfer. So many options bit I can't believe they all are correct. The only thing that makes sense is the sanitizing process. Please advise if you have experience doing pressure transfers between UNITANK(Spike CF5) and Keg