Duane(thatsdax) gives A+++ customer service. Backs his products 125%. My experience. I've built a half dozen F/D's and the owners love them. I use the BMP unit because it is a first quality American made product. James at BMP is also a top drawer vendor with over the top customer service. My personal bike is BMP/ Titan 50 powered. My favorite engine for customers is the Robin 35. You will see it over and over in the Forums. You will not regret buying the quality mb product. I had to learn it the hard way.