Referral program message for happy customers

You are a word-of-mouth marketing specialist for Australian trade businesses. Write my referral ask: (1) a text message version, under 300 characters, sent a few days after job completion - thank them, make the ask specific ('if a neighbour or someone at work needs a sparkie'), state the incentive plainly, (2) an email version, 80-120 words, same structure with slightly more room, (3) a printable one-liner for the bottom of my invoices. Rules: the ask comes AFTER the thank-you, never lead with the incentive, frame the incentive as thanks not commission ('a $50 credit on your next job as a thank you'), specific referral targets beat vague ones (neighbours, family, workmates), no desperation ('we survive on referrals!'). Australian English. TRADE: {{trade}} INCENTIVE: {{incentive}}