Intruder said:

Okay, thanks for the notice. Would you recommend leaving SetMemoryMax out and let AviSynth control it?

Sorry let me clarify. The SetMemoryMax does set the caching amount for each clip in the script, but I'm not sure exactly how it's allocated and whether they are all loaded into memory at the same time or if some clips become unloaded to make memory for additional clips. As far as I'm aware the memory allocation is dynamic and it accommodates additional clips by reducing available physical memory for each one automatically, so yes I would leave it alone.