Thank you very much. The instructions did take me all the way through to replace several ruptured black and white hammer caps. However, no pointers given here on cap replacement. Sharing for prosperity sake.

Cap replacement is an easy affair. After removing the broken rubber pieces, remove excess grease to ease replacement. You should temporarily cover any holes with small piece of paper just in case the replacement cap slips from your finger and disappears. Identify correctly the B - black cap and W - white ones from you spare caps. The curved surface should be upward and the smaller opening slit should be facing inwards. Insert it using an above to below movement while holding the metal hammer steady. Don’t forget to reapply some grease upon completion.

A reflection. A professional keyboard repairman did suggest a complete replacement of all the hammer caps as they tend to break / rupture approximately the same time. So I had to do this keyboard surgery twice over a period of less than 5 months.

In my model CDP230, upon removing the inner most side panel, 2 screw brackets will come loose each side. It will fall somewhere behind - you will need these when closing once again the panels. It has its own alcove but because the keyboard is now on its back (flipped), it will naturally fall out. What I did was to place the keyboard in its natural upright position when closing the inner and outer panel. And placing this screw bracket at closing the inner bracket.

My experience 1st time doing it was terrible because of the double sided adhesive tape applied by the factory. So with gentle traction and plenty of patience it did finally give way. The second time around it was much easier.