Added 3.25 magnet pockets

Love the 20 degree #Gridfinity base but I found that is seemed to bounce and doesn't like tall bins. Remixed to add magnet pockets. Second plate added for peg board pegs. This model, like the original, utilizes AimeBuilder's Universal Peg Board System with is very stable and works great with many different models. This model includes supports! Is it a lot of support material? YES! Almost 25gIs it worth it? YES! Makes the 20 degree model a lot more stable!Have I printed too much Gridfinity things? YES! You can blame Zach Freedman for coming up with it all!