I used only 1 20x30" foam board. I used 4x 9 gram servos. 2832 1200kv Brushless motor with 30amp ESC. Spektrum AR620 6-channel receiver. 2200mAh 3S battery with T-60.
Ultra Lightweight RC motor glider DIY Build video How to make Scratchbuilt Ultra Lightweight 2 meter RC motor glider (FAA registration not required, under 250g Weight Limit)