Laying clone pots on their side

I have a very low headroom space for rooting my clones. I usually use the red, plastic cups filled with mostly perlite with a little soil mixed in to keep the perlite from floating every time I water. But the clones are growing quickly and I'm running out of headroom.

I was thinking about just laying the cups on their sides and allowing them to grow that way for awhile. Eventually, when the flowering tent is available again, I will switch the lighting schedule back to veg and put the sideways clones in there.

I could either keep them in the sideways orientation, or I could pot them with the stem vertically oriented and allow them to grow out of it.

Anyone does something similar?

Advice? Comments?

Thanks

Training tek to make more side arms is Layin em on their sides and rotator them daily

I plant plants layin down n let em grow back up then bury them deeper get a big L shaped stem