EFX
Contributor
You can't directly change the GF setting in a Perdix in rec mode anyway. They are preset and unchangeable, determined by the low, medium or high conservatism settings.
Starting with v65 of the software you can set the GF's in rec mode. The preset GF's for low, medium, and high conservatism are still there but a fourth option called custom lets you adjust the GF's. Sorry, if someone already replied to this. I haven't read through all the posts yet.