And so it continues..................
Go for it, you have nothing to loose. But with all of planing why not just build a Toymotor up instead?
I know from a VERY reliable source that CALMINI are still doing a SAS kit but it has to be 100% before release - from a commercial point of view you will all agree that this makes sense.
Personally I have done a SAS on a Kick using coils. Yes it is a lot of work but it drives SOOOOOOOOOOOOO nice

. Articulation is fantastic and I am happy with the result.
Leaf springs are good - coils are BETTER!
I have played with a leaf sprung Sammy and it worked real well but coils - Yeah Baby Yeah

I am now building another Kick with IFS, I am looking forward to the challenge of getting it sorted out properly. I really like the benefits of IFS - but that is another story.
Anyway - Good luck and I hope it all works out
