I want to state clearly that:
In no event will BitsofthePast.com or its founders be liable for any personal injury, loss of use, loss of profit, interruption of business, or any indirect, special, incidental, punitive or consequential damages of any kind (including lost profits or explosive disassembly) due to use of the designs being freely distributed on this website. Bottom line there are no guarantees that the designs available from this website are absolutely "bug-free", so build or buy from some other seller at your own risk.
Several small Atari XL/XE internal PCBs that add memory, allow multiple OS choices, add internal parallel printer adapter and protect the original v1 Candle Ultimat1MB from damage.
Several 8bit cartridge boards that extend or re-orientate connector angle, and allow 128K Super XE compatible games.
Several pcbs that breakout the PBI/ECI connector signals, extend/re-orientate the connector, adapt one style to another and add hard drive like storage.
Two advanced XF551 5.25" Floppy Disk Drive PCBs are now available to replace the poor quality and flaky original mainboards in the last Atari made floppy disk drive.