Some precalculations:

• My weight: 76.30 kg
• Combined: 77.45 kg
• Empty bucket: 1.15 kg

Bucket #1 (PV):

• Combined: 88.95 kg
• Grapes: 11.5 kg

Bucket #2 (PV):

• Combined: 88.45 kg
• Grapes: 11.0 kg

Bucket #3 (M):

• Combined: 87.55 kg
• Grapes: 10.1 kg

Container (M) which is about of 3 buckets:

• Combined: 108.25 kg
• Grapes: 30.8 kg

Total:

• Petit Verdot: 22.5 kg (49.6 lbs)
• Malbec: 40.9 (90.2 lbs)
• Combined: 63.4 kg (139.8 lbs)