At the request of some, A SHORT RUN HAS BEEN COMPLETED AND THESE ARE NOW AVAILABLE as of Nov 15, 2013. A few sets have been shipped out already.
They are to reinforce the playfield from horizontal bowing and will reduce existing bowing. These are made with strong industrial materials, not what you find at HomeDepot. Many have been picked up by Safecracker owners and all feedback has been positive. The ball runs much truer. The can be installed in about 30 min without taking the playfield out.
Anyone that has installed them, please share your experience.
Anyone needing details can PM me. Feel free to query other areas regarding feedback.
The $165 price INCLUDES shipping and 6 pages of detailed instructions. Enjoy!