Two mounting options to be used with PIKO BLX flight controller. This uses 1103 mounting holes and will allow 55mm props with the PIKO mounted either square or 45 degree angle. If mounted on a 45 degree angle, 65mm props can be used. This is the 1.5mm carbon version and weighs 6.8 grams.
The holes are 3mm so nylon standoffs work best. Here is a link to a top plate that works well: http://armattanproductions.com/pages/product_details/4434. This top plate weighs 1.1 grams.