so any changes in the sound pre and post foam?

sounds like i shouldn't bother with the mineral wool?

I think the SR-Lambdas sound awesome completely free aired. There might be a wee bit of bass bloat in the midbass, but IIRC they are a bit more open sounding. The bass bloat might even be related to the headphones, even my SR-404 suffered from it to some degree. I can't wait to try these on a proper estat amp instead of the SRD7; lots of juicy stuff being designed.

in the enclosure or on the baffles?

well the rotted foam i removed from the enclosure alone made pretty nice difference. wasn't expecting anything really cause how rotted the foam already was but cleaning everything up and making it free-air made the sound more ''open'' so to say.

the craft foam was used to distant the pads from the drivers more thanks to maverickronin mentioning the idea of using the craft foam instead cause i was gonna try cardboard or something at first but, the craft foam works tons of better. i think distancing gave them bit more treble which is welcomed since the sr-202's little relaxed in that area. i think cause it allows more of the driver to reach your ears more when playing cause without the foam the drivers were really close to my ears almost touching them so i only was utilizing part of the drivers when listening. still has strong bass output as well which i like but i think due to driver excursion limitation it can only extend so far.

i believe the mineral wool for the lambda pros was to help tame the treble/top and bass a bit. that's about it. i tried bit mineral wool in the sr-202's and it killed the bass completely but probably cause i used too dense of piece.

also as a tip if anyone looking for mineral wool,roxul makes it. can be found at home dept but i believe in only large batts(50lb bags). mineral wool is basically a marketing name too since mineral wool comes in different materials and densities(fiberglass wool, stone wool, ceramic wool or mix of all 3. ceramic wool is the denseness cause it requires much higher temperature to be made compared to stone and fiberglass. thing awesome too mineral wool/stone wool is liquid and fire resistant and won't ruin the absorption properties like fiberglass). mineral wool also is more dense to fiberglass for same R value and can come in higher R values compared to fiberglass(unless you live in canada. canada allows higher R value fiberglass but mineral wool still can be bought in higher values as well also). only downside to mineral wool is it keep it's shape. it's not as flexible as fiberglass so you can't shape it and put it anywhere. if you try bending mineral wool it will break so it has to be cut.