Oops, sorry for the missing file. I updated the zip so the link above should work.
And yes, it is possible to add lock fader function - the lock fader state could be saved into a variable in R4 and the next fader could be selected conditionally dependent of the state flag. But I'm affraid it's not on my priority at the moment

. My apologies. By the way, do you use R4 for commercial purposes?