Rennsteig has some of the best customer service and product knowledge. It's a relief to know I have a reliable source that is prompt and helpful when I have questions. Mirko is my rep and he's always helpful. We have ordered the crimping tools and use them on a regular basis. The time you were giving out free t-shirts was like christmas for me and my coworker. It's nice to get a little something extra with your order. And we do wear the t-shirts! Rennsteig does and outstanding job. I have other vendors that take days and I sometimes have to follow up a second or third time. We at Next Solar Systems like Rennsteig and the products you offer! Great job and many thanks to you!