Thinking of investing in one of Rapid70's bullpup kits. Looking for feedback from anyone who's had experience with the vendor and /or the product. I'm a little concerned about ergonomics because I'm a lefty. Wondering if the magazine will interfere with cheek weld. Also concerned with length of pull as far as what others think about shootability with such a short, shoulder fired gun. I own a Mutant short and I have no problems with the size of that gun but this one seems smaller still which is why I'm fascinated with it.