Quite dry and tart so I adapted it to the following with great results:
• 1 1/4 oz (37.5 mL) Four roses bourbon
• 1 oz (30 mL) Montenegro amaro
• 1 oz (30 mL) Aperol
• 2/3 oz (20 mL) Lemon juice
• 3 drops of 20% saline solution