grrr, I moved last xmas from a full blown desktop machine to a thin laptop with win10. for now it works. he modded the driver for large transfer to get higher speeds. his tool is running in the shell and looks like norton commander 25 years ago ;-) I don't think it is worth to port it, but I will send it to you via PM for acadmic reasons w/ source. yeah sure I forgot the central pillar, but if you move the sd-slot to the left or right it should be possible and not so bad with the maybe missing symmetric optic if the SD-card is fully inserted. I have no clue about 3D-printing, but Darius sounded like 3D-printing would be to expensive, at least for now where so much defective old carts are out there. so for programming the CPLD not to flash a SGC over this JTAG outside a saturn ? but there are some unused pins left ? even a slow serial link option with those 1-2 buck$ usb-com-converters will do ? so hitomi2500's approach with a FPGA with RAM on chip or emulated RAM in the gates is the easier solution for this problem ? this will do for now, so to speak I will take the just "USB Dev cart" you have in stock (more via PM). I don't play that much, so a cheat option is last on the list. in general I looking for the ultimate cart (in 3-4 years), "one for all" pcb but modular (not fully populated) to save costs ? - so a pure gamer buys only e.g. the SGC-version. - a homebrewer buys the usb-dev-version - the collector the ultimate-version but all have at least 3 function: - import adapter - pseudo saturn - 1m/4m ram and one of the obligated options: - SD-Card (with a better CPLD are higher speeds than 40 kb/s possible ?) - USB so we could get a broad base (worldwide) to load homebrew (and later semi-commercial releases like on dreamcast) from CD-R or SD or USB. but all depends an jhl's mpeg-slot-cart (price point, features), it maybe cheaper to have 2 carts in different slots, and you or somebody have not to invent the wheel again for usb-loading (maybe only from USB-device instead from USB-PC-Server). I have no knowledge about costs for SD-cart-slot vs. usb-chip or CPLD vs. FPGA, the above are just pure ramblings from my head. for realtime cheat hunting like with AR / Commslink or ODE-feature (like jhl's mpeg-slot-cart) ? what hidden gems you have in the pipeline ?