Do any of you guys have printers set up in your truck so you can print invoices and estimates out on the job site? What size power inverter do you have? I have a Samsung ML-1740 series laser printer. I want to purchase a power inverter and use it in my truck with my laptop to print invoices and estimates while on the job site. What size power inverter will I need to run this ? (750, 1000, 1200, 1500 + watt etc) Thanks!