Squats and deadlift numbers, corelationship with max watt output

Imo core isolation is a waste of time, olympic press,deadlfits,squat, thats all good core work. 80kg by 10 sounds like a shoulder machine press.

No, I only use the machine for leg press
Free weights for everything else, good to get my muscle balance strong

50/50 power distrubition between left and right seems odd, isnt there normally a dominant side?

Well from rowing training on ergs its all balanced stuff. Thats the major leg training I have done so I guess thats why