The present invention relates to methods for producing transgenic animals using retroviral constructs engineered to carry a transgene of interest. The fully deflected positions of the optical element may be defined against linear segments on a platform or against linear segments on the optical element. One of the initial shot layout and the at least one additional shot layout is selected as a final shot layout. The explosive device can be used for various applications, including but not limited to military weapons, pyrotechnic devices, or civil blasting explosives, for example. Each of the conductive paths connect to the electrical contact at different interface locations.