I have an Ohler 35P with the proof channel and printer. Has 3 skyscreenes, three sheilds and comes with the chrono and printer all in one.They stopped making them for some years but now they are building them again. Don't turn your back on yours as some fool will sit in your stool and blast a round downrange. That has happened to me a couple times. After a little come to Jesus talk to the offender he usually doesn't try it again. Any shots through the screens is fired by me. I'll do a few strings for someone so that they can get some data. Don't know what they go for now as I bought mine about 20 years ago. Frank.