R.A. Posthumus on Twitter: "@SwissMicros using your #DM42 for a full week on my work and after a firmware update, I must say: Bravo you made a worthy followup on HP42s. https://t.co/kmDLU9dvme" /
SwissMicros order is confusing. DM42 seems like a refurbished unit or old stock. : r/calculators