In one of the graphs (400m S-L) Charlie has a separate Power Speed day with 6 sets various plyos including LLRR. I asked if this could be changed as follows
with the 400m S-L template you have Power Speed & Strength Endurance on Saturday, instead of a separate day could you divide that up over the other 3 HI days so instead of weeks 1-4 being 6 x 30m Power Speed 1 on Saturday you would do 2 x 30m after each session on M, W, F. This would allow another rest day.
and was told yes, everything is possible.
Not sure why you would do them pre starts.
My understanding is Charlie’s issue with single leg was the way they are generally done (1 leg only for distance). LLRR is a much safer option.