I posted this over on the Ryobi forums, but it has not appeared, so I'll try here.
My BT3000 has the blade raising issue, lowering seems OK. after doing some reading, it seems I'm a victim of the dreaded shims. I tried to remove the arbor guide to look at the shims (both present), but stripped two of the screw heads. I can probably get them out with an impact screwdriver. I cleaned the gears that raise/lower the blade and this helps, but it still jams. If I apply upaward pressure to the back of the arbor guide, the blade raises OK. The guide seems to have some slop in it from back to front.
Since both shims are still present, is this still likely a shim issue or something worse?