Placing 911L board in SXT

Hello
many of my sxt that ware installed last month are burnt (mostly Ethernet port) and my distributor refusing for replacement so i wanted to know can we put a 911L board and solder the antenna etc in the sxt box??

i have noticed the 911 is a bit big in size but i believe the corner area can be cut without damaging the PCB (thinking it to be a 2 layer pcb only) can any one form Mikrotik confirm is it safe to cut the 911L form the place that i have marked with marker in the attached image