Review on 🔌 SunFounder Raspberry Pi RAB Holder Breadboard Kit with 830 Points – Solderless Circuit Board & Raspberry Pi Holder for Arduino R3, Mega 2560 + Raspberry Pi 4B, 3B+, 3 Model B, 2 Model B, 1 Model B+ by Larry Gaines

Of the three baseboards I tried, this was my favorite. Not only does it fit two boards (my photo shows UNO and Mega, although the UNO slot is for Raspberry), it also fits a small or large breadboard. It can hold two small breadboards, giving it added versatility. I set mine up with a small breadboard and left some space on the tray to put on a few components. There is a nice ledge around this space to keep the components from rolling or falling as easily. I find this a really useful advantage over a flat acrylic baseplate (see photo for an example). The base is nice and rigid, with neat inserts of internal metal threads molded into the plastic (no fiddling with tiny nuts). It is beautifully made, very functional and well worth its modest price. Highly recommended.