tbh, it just seemed like I got reduced effects. I got a slight buzz and felt really chilled out, but nothing more. It was kind of nice, but in the future I probably won't combine because it's basically a waste of LSA like Hanniba1 said
It was cool though because I was producing music and the extra thoughtfulness/buzz of the LSA was a good combo with the concentration/motivation of the concerta...an interesting idea for my creative pursuits in the future
anyways, thanks guys!