If you want to benefit from compound exercises like stiff legged deadlifts then you're probably going to end up working muscle groups more than once a week.
Yes, but that can lead to over training. Natural athletes have a limited ability to recover so I try not to touch the same muscle more than once a week. Maybe I will use leg curls for noe while squating. I also cut out dips for now because my current program has me doing chest one day and shoulders on another so I am skipping dips for this protocol. I felt like I needed something new anyway.
Hopefully the leg curls will hit my hams as much as the SL Deads did.