Today I tried a Rubi TZ. Pretty robust machine, but the breaker system??? YUK! Its like a rachet. You have to give the handle two flicks upwards to drop the breaker and flick it again to bring the scoring wheel back down. I was trying it on a bench and unless you pull the whole system towards you, you need bit of reach required for it to work and you still question yourself as to whether you have it in the right position or not. They've had an idea to speed up the cutting process by trying to shave of a second or two per cut, but in practice, its failed and made it take longer. Very expensive and that breaker system if it goes wrong will cost a very pretty penny or two. Maybe I just need to get used to it, but as it stands, No Likey!