Of course, Enrique! I'm tickled that you remember me - and delighted that both Kleinbots have survived across the years. I do check every item that I send out

Of course, Enrique! I'm tickled that you remember me - and delighted that both Kleinbots have survived across the years. I do check every item that I send out -- I hold it up to a bright light looking for cracks - but sometimes trouble sneaks through. I'll do my best to fix things - replace, refund, or solve a differential equation (ODE, not PDE's, please). You, in turn, have a responsibility to spread the good word -- I hope you're teaching & making this too-mundane world into a better place. Across two decades, my warm wishes to you. -Cliff