I use Madok for replacement coils. Delivery is always on time. Many times my customers do not have all the information that I need to select the appropriate design, but Madok works with me so I can respond to my customer quickly with drawings and competitive pricing. Their engineering team come up with creative solutions and have noticed previous design problems and offered options to correct them. The quality is always excellent and I have never had an issue with a Madok coil. I only use Madok for replacement coils.