I can't remember the last time I spun a slimline. Burned out on them years ago. There is a whole new world out there once you try some of the other kits that are available. Just look around the forum and you will get a real good idea of what some of the other tuners are turning out, especially the casted and completely custom pens. You will pay more for other kits, but the hardware will also compliment your work better!