The distance cylinders have a horicontal bore with a thread. So the position of the keys can be adjusted. Notice, that the springs have to be twisted in a radius, bigger then the distance rings. If B is pushed, low A will open automatically. I know, that a proper C should have a closed low G, also a proper D will not work.
Next problem is the balance of the right hand.
To give a resting place for the index finger, a bar is superglued to the chanter. The length of this bar depends on the remaining lengt of the finger. The index finger is moved into the groove and allows the thumb to get the right position. This might make the chanter twisting around. In that case, a tube should be inserted into the groove, to hold the chanter more stabil.