This is slightly OT, but I'd love to get my hands on the CAD software on that Mac! I periodically do file conversion on ancient Mac CAD files (think OS 8.x era) and have a lot of trouble reading them properly with modern CAD software for the Mac, even in Classic mode. So, I hope you didn't erase that old copy of CADintosh yet!
Can you PM me with any software availability? And before the anti-piracy crowd chimes in-the companies that made these old softwares don't exist anymore for the most part, and those who do don't support their ancient software or offer it for sale, believe me I've tried! You can't even find it on eBay..