In both cases, you have to take out the keybed and control panel screws from the bottom and back so the keybed can slide around a little. I'll leave it to you to figure out which screws to remove.

You also have to remove the key from the keybed to fix the action under it. Remove the spring from the non-business end of the key, then slip a small screwdriver in the slot at the same end to release the retaining tab.

Problem 1: Broken keyweights. Simply rough-up the end of the lead weight in the broken-off piece a little and epoxy it back on. Do this without removing the other end from the keybed to save a lot of grief!

Problem 2: Knocking sounds under white keys when played hard. This is caused by a tiny piece of plastic in the keybed breaking off - you'll find them rattling around. The knocking is caused by the weight hitting the underside of the key. Solution: A small strip of self-adhesive rubber door insulation stuck to the underside of each white note in the right place. I bought a roll from Home Depot and did the whole keybed one afternoon about a year ago, and no problems since.

Good luck - I love the keyboard action and piano sounds.

SCORE- sounds 5/5, controller capabilities 5/5, reliability 1/5

I use it as a stand-alone and also to trigger other modules in live performance. my only hang-up is it is too darn heavy!!!!