For j4, squid made a video where he uses a 4 input 45, this is actually possible with 2 inputs and it is very precise (possible by .003)
I created the s2cw 4b cobweb ceiling, double 45 over cobble wall into 2bc, and the one I jumped off of
I skipped with 2+1 elevation cake one because its not really a double 45, I also walked off it and I already had 1 jump I jumped off of, and the timing is really weird for it.
