Assuming it's fully complex, use of the prop control, power settings, leaning safely. When to retract the gear, when to delay retraction. Rejoins without overspeeding the prop... The major focus for me on conversions is the emergencies side - ie glides with gear up & down, looking at using prop rpm to vary glide range, and gear failure scenarios. Basically the what ifs! Anything else should just be standard checkout, getting used to the handling and speeds.