yeah I am not too flexible either, with big skier thighs, and the thigh braces in my EZG would seriously crimp my quads, sort of over the femoral area. that sounds like a partial culprit. I should have taken out the adjustable SOBs and just glued foam in there. luckily that boat is on to the next one....
if I recall the micro doesnt have any of that removable stuff, just a lip padded with foam coming down inside the boat. if that cuts across your femoral area (inner thigh) that could cause decreased circulation. there is also the Sciatic (sp?) nerve that gives a lot of people leg pain. Maybe thats part of it. If you cant adjust/ customize your outfitting to max comfort then...see my prior long winded post, and what Ture said. Good luck!