Meditation + SSILD

I've started using SSILD as a prelude to my mediation. I've only tried it with my single-point meditations and not yet with seated Vipassana. I know with SSILD that you are supposed to focus on the external, specifically external physical sensations; but for meditation i change it just a touch and visualize a scanner scanning down my body looking for input. I take my time on this step, doing it only once per cycle. By doing so, within 7-8 cycles, my body has entered sleep paralysis or very nearly so. I then refocus solely on my visual and do my meditation. It seems, at least for me, a very quick entry technique for a deep meditation, as it internalizes my focus extremely well and quickly. thanks for reading