We've had people with pincabs for 4+ years now. I don't think I've read anywhere where an LCD cracked from being in a horizontal position. However, we have seen several plasmas that have cracked within a year. Perhaps since plasma screens run hotter than LCD's it can soften up the glass after extended period of use time. I'm sure it's possible for LCD's to crack from a horizontal position, but the time is definitely longer than plasma. My 42" LCD has only been horizontally for a year now and I've never had any kind of problems with it. It still looks and acts like it was when it was brand new. Most people also have foam tape padding and cross braces to help support across the LCD back. Of course jarring or banging can cause them to crack, but the minuscule amounts of jarring/banging with properly adjusted tilt isn't moving the screen much, if any, at all. My LCD also rides on rubber grommets, so if there is any screen movement it's the grommets that are taking the pressure. Really, only time will tell.
I do agree that having glass over the screen for protection is a MUST! Not having glass could cause anything to happen to the screen.
So, RandyT - I've already talked to Ultimarc regarding the growing digital pinball scene, but I don't recall if we've talked to you about it. We are needing someone to step up and help develop a analog plunger system. We have the
Mot-Ion kit from NanoTech, but getting one is un-reliable as people are waiting about 4 to 6 months for one. Ultimarc stated that there isn't enough market to warrant R&D, but there is definitely a market and it seems to be growing and picking up steam. I think it's a potential un-tapped market that's crying out loud for a GOOD plunger solution.