I usually make a copy of the repair manual pages of the valve body and use scotch tape and tape the orifices and balls on the copied pages so that I know where what goes back in. Also pay attention to the way the orifices are installed, which side is up and which down facing.
Springs: yes, already found some broken ones in 4HP24 and replaced them.

Send me a PM with your email address and I will send you some info.