@some bent verbs

Most /AtmanepadI roots are objectless, like ruc रुच् "has a good time" —

ruc रुच् + /zap + /laT → !**roca- रोचॱ + /laT

**roca- रोचॱ + /laT /ta
→ **roca- रोचॱ + te ते by Tita::Atman...
→ !**rocate रोचते

or vRt वृत् "revolves, spins, happens" —

vRt वृत् + /zap + /laT
→ varta- वर्तॱ + /laT by gbH
→ !**varta- वर्तॱ + /laT

**varta- वर्तॱ + /laT /ta → !**vartate वर्तते

But there are also transitive roots that always take /Atmanepada endings —

labh लभ् + /laT → labh लभ् + /zap + /laT by kartarizap → !**labha- लभॱ + /laT

labh लभ् + /laG → labh लभ् + /zap + /laG by kartarizap → alabha- अलभॱ + /laG by luGlaGlRGkSvaD... → !**alabha- अलभॱ + /laG

**labha- लभॱ + /laT /ta
→ labha- लभॱ + /te'''
→ !**labhate लभते

**labha- लभॱ + /laT /thAs
→ labha- लभॱ + /se'''
→ !**labhase लभसे

Some verbs can work both ways. As for instance nI नी usually means "to lead" and takes /parasmaipada, but it takes /Atmanepada when it means "carry home" or "take for oneself".

**naya- नयॱ + /laT /ta → **nayate नयते

Other verbs take both sets of endings randomly, with no change of meaning at all.