A hybrid linear wire model for tuning the transistor widths of circuits linked by RC interconnects is described. The design of the compact, substantially cylindrical device incorporates the combination of portability, functionality, user discretion, and neatnessconvenience of use lacking in the prior art. The method includes updating the signal level of the control signal according to feedback of the cross-voltage or the control signal, such that the laser power is adjusted accordingly. The entire command may be shaped or only selected portions thereof which produce vibrations. The column of contacts of the first and second microelectronic elements can be aligned with the respective first and second parts of the opening. In another embodiment a nanolayer of the damping element is located within each of the two free layers.